Web Analytics RiceHigh's Pentax Blog: Build Quality
Showing posts with label Build Quality. Show all posts
Showing posts with label Build Quality. Show all posts

Tuesday, March 15, 2022

DA*300 has Become the Lens of a Mini-satellite

See this official press release:

https://news.ricoh-imaging.co.jp/rim_info/2022/20220311_031667.html

This Pentax lens was chosen because of its full metal barrel construction as well as its high resolution but yet compact size. By the way, the lens contributes to almost half of the size of the Japanese mini-satellite named "Kitsune", which was launched to the space via an US rocket in February this year.



Tuesday, February 23, 2021

The K-3 III is Delayed and Here Comes the Re-packaged 3 FA Limiteds in HD

We all knew that the K-3 III was delayed without a new release or market launch date announced. :-(

Hence, Ricoh is "kind" enough to let us have something else "new", right before the CP+. ;-P

Here we go:

(Source: Japanese Nokishita Twitter via Cameota. In short, the new features of the re-packaged FA Limited lenses are HD plus SP coatings, round aperture and blades and guaranteed -10 deg.C temperature operation, there is no Weather Resistance, nonetheless. Anyway, my old FA Limiteds have never had any problem working in cold and snowing conditions under -10 to -20 deg.C in the past, so did my other film FA lenses, but getting the lenses wet might cause real problems. As for the aperture ring and aluminium casted lens bodies, these are indeed good old features but nothing new.

Update (Feb 25): The HD FA Limited Special Site is now online (in Japanese only). Online pre-ordering from the Ricoh web store is also made available. The offered prices are not cheap, though.

Thursday, December 24, 2020

DC Watch's Hands-on of the K-3 III



https://dc.watch.impress.co.jp/docs/news/1296875.html (Google English translation here)

https://dc.watch.impress.co.jp/docs/news/1297078.html (Pentax' brand statement with the K-3 III, Google English translation here)

And, the below video recorded the shutter sound and demonstrates the burst modes of the K-3 III:

 

(https://youtu.be/Pmfrk038Go4)

Wednesday, July 16, 2014

645Z Sand+Water Test


Saturday, December 14, 2013

Sony A7 Water Test - Water is My Friend! :-)


http://www.youtube.com/watch?v=A7hvJTGW4BA


http://www.youtube.com/watch?v=lT0iDwiPNhs

Monday, October 21, 2013

Let's Not Forget the Prominent History of Asahi Pentax (Re: Pentax 67 and 645)

While Ricoh continues to ricohize the Pentax camera and lenses (recent examples here, here and here) and dwarf the name of "Pentax" (instead of strengthening it further!), I am glad to see someone still remember Pentax the brand and is yet making a product with the old genuine brand name of Asahi "Pentax" and here it is!

http://www.dodgeandburn.com/collections/shop/products/six-by-seven

I have got one and found that the textile quality is good and it looks cool. Below are two snapshots with my 645N SLR camera (taken with my *Pentax* K-5 + DA35):



Btw, the original Pentax 6x7, together with the original Pentax 645, are recognised as one of the milestone cameras of Pentax by AOHC whilst my 645N is recognised as a masterpiece. So, why not a 645 T-shirt also? Besides, I would want more colours of the T-shirt instead of only that light cyan colour for the background to "select" from, nonetheless.


Related:

True Fanboyism!

20 Millions of Pentax Cameras in 2013

The 645D Kit (Lens) Got Delivered to an End-User, Finally!

Wednesday, October 09, 2013

Official K-3 Promotional Videos at YouTube













Monday, September 16, 2013

Lead Glass and Lead-free Glass for Photographic Lenses

I agree that these are long reads but really interesting:

http://optics.org/indepth/2/7/3

http://rohs.exemptions.oeko.info/fileadmin/user_upload/Stakeholder_comments/Exemption_13_several_industry-stakeholders_27_March_2008.pdf

Via: http://www.dpreview.com/forums/post/52159193

In short, lead-containing glass is still better optically, less temperature sensitive, more stable and actually cheaper to make. The use of lead in some optical appliances is actually exempted by RoHS directive but the adoption of lead-free glass in photographic lenses is yet the trend and the future of the industry.

Btw, I am glad that I still have some of those toxic Pentax glass that are lead-made, including some of the best F, F*, FA* and FA Limited lenses, which are now used on my Canon 5D3 FF, examples here and here! :-D

Wednesday, August 21, 2013

(Different) Optical Constructions of the Four DA18-55 Zoom Lenses

Source: http://forum.xitek.com/thread-866434-1-1-1.html (in Simplified Chinese)

1. Original DA18-55 - 12 Elements in 9 Groups, One Aspherical Element:





2. DA18-55II - 11 Elements in 8 Groups, One ED (Extra Low Dispersion) Element:





3. DA18-55WR - 11 Elements in 8 Groups, One Aspherical Element and One ED Element:





4. DAL18-55 - 11 Elements in 8 Groups, No Aspherical nor ED Element of Any:





After all, it seems that the optical formula and construction of the DA18-55WR should be the best. On the other hand, the optical design of the DAL18-55 is a cutting corner one, which should perform worst. Not even to mention about the cutting corner build of the DAL, which adopts a plastic mount and the quick shift focus mechanism is removed altogether.


Read Also:-

Standard Zoom Mega Shootout! (DA Vs FAJ Vs DAL Vs SA Vs FA!)

K-5D Mark III: DA 18-55 II Converted to a 24-80 FULL FRAME Lens!

Wednesday, January 09, 2013

Pentax Offers 100 Colours of the Q10 for the US Market



Further to what has been offered in the Japanese home market for the Q10, now custom ordering is also available for the customers in the US market. See what Engadget reports:-

http://www.engadget.com/2013/01/07/pentax-offers-100-different-custom-color-options-for-its-q10-ilc/

As for the Q10, last time I tried, it feels too plasticky than my like, especially when it is compared to the original Q.


Last Related:-
 
100 Colours Q10 - Real Dummy Units!

100 Colours of Q10 are Available for Ordering Now

100 Colours of the Q10

Tuesday, December 04, 2012

My Q is Here! :-D

Finally, I've got it! At (US)$350, these four things are bundled!



So far, at this price, I love my Q. It is just a lovely little DC, with very good image quality for a compact and is really very easy to carry anywhere and is surely very easy and a fun to use! And, the build quality is really impressive, it feels far more solid than my K-5 when put in my hands! :-o



Here are some quick samples, made directly out of the Q, the EXIF is preserved. I am actually impressed with that ISO 1000 shot, for the low noise and image details retained:-



Besides, the colour and exposure accuracy of this cam is not bad. More samples would follow later..

Tuesday, November 27, 2012

Death of My Second Pentax SLR


(Above: My MZ-30 with my FA 43 Limited)

The week before, when I tried to use my MZ-30 for shooting film, the light meter first went nuts and then the mirror locked up after pressing the shutter and it did never come down again anymore no matter how!

I used nearly new Panasonic CR2 lithium batteries and its expiry date is in 2020, which worked completely flawlessly when they were put into my MZ-S. Really too bad.. :-(

And, my SFX did die twice like that, for exactly with the same symptom and for what happened. What an unfortunate "coincidence"! >_<

Btw, can anyone tell me that what has been going wrong with this "mirror locked up" issue? :-o


Related:-

When the Super Pancake Meets Different Bodies~

Can Pentax DSLRs be Made Thinner?

"Film is Dead"! ;-)

The World First / Pentax First: My (Obsolete) Pentax Collection

Extreme Low Temperature Test: Shooting at -30 Deg.C with K-5IIs and DA* Lens

with an industrial grade Apacer SD Card:-



http://www.youtube.com/watch?v=yX15rE7a7SM
(Official test and promotional video carried out by Apacer.)

Really impressive! Finally, I can see some marketing effort by Pentax Ricoh and their collaboration with others! :-o :-)

Wednesday, November 21, 2012

The Three Original FA Limited Lenses (First Batches)



Credit: http://forum.xitek.com/thread-1030323-1-1-1.html (in Simplified Chinese)

These are all the original first batches of the Japanese made FA Limited lenses, note the different coloured genuine leather pouches and a different lens cap printing of the Pentax logo for the 43 Limited.

Btw, that Pentax guy has quite some exotic Pentax film glass, like FA*300/2.8 and FA*400/5.6 as well as the rare FA*200/4. But those were the days when Pentax still made and marketed those higher grade glass with better specifications.


Related:-

Some "Lost Stories" About the Three FA Limited Lenses

Super Pentax Lens Arsenal w/ Sample Photos (Nice~)

FA Limiteds: Made in Japan Vs Assembled in Vietnam (Continued)

FA 31 Limited: Assembled in Vietnam Vs Made in Japan - Case Studies

Dirty Pentax Lens Factory, Dirty Glass! :-(

Expensive Lenses, Poor Quality Control

Saturday, October 27, 2012

EOS M First Hands-on Impressions

First played with a M with the 18-55 STM kit zoom for about 15 minutes and here are what I found:-

- The body is really nicely built and it feels very solid in hands. Unlike all other mirrorless bodies, the M is actually made in Japan.

- The body is thicker than the NEX but is obviously thinner than the K-01. It feels a bit heavier than my NEX-3, which is yet the lightest and most compact APS-C mirrorless body ever.

- The M does not have a built-in flash nor supports an EVF neither, which is even worse than the K-01 which has a built-in flash!

- The LCD monitor display quality is good, the touch screen is fairly (but not very) responsive.

- The AF is rather sluggish, though. The environment I tested it is fairly bright. It sometimes missed the focus when the DoF is large, say, at close distances. To focus on far object, the AF time was shorter.

- When using the AF with touch focusing, the camera seems to focus slightly faster. But I just wonder why, or my feeling was wrong. Under this mode, the camera will shoot immediately after the focus is achieved, which may not be good for this design if you want some control for when to take the picture but I understand that this is intended for the novice.

- Also, turning off the touch focus function the camera seems to focus slightly faster, too.

- The mechanical shutter action is smooth, light and quiet, better than all NEX here (I just used a NEX-7 of my friend the week before). Unlike the NEX and the K-01, I can't really hear the double shutter actuations of the M. Indeed, a light touch is important as it would cause less camera vibration caused by the first shutter actuation.

- The shutter lag of the M is long but I think it is comparable to the NEX and is a bit faster than the K-01.

- As for the operation, I haven't yet adapted to its menu system and operation interface as there are very few direct buttons and no mode dial at all. On the other hand, there is a record button at the right thumb position at the camera rear which is very handy to use (same as the NEX' design).

- I haven't tried the video function yet, maybe I shall try later.

- Still, I think the NEX-6 maybe a better package and offer all in all for that very close price range, of which the ILDC related technologies should be more mature.


Last Related:-

Two Really Good Things of the K-01!

Wednesday, October 10, 2012

Ephotozine DA50/1.8 Test, with Full Samples


http://www.ephotozine.com/article/pentax-smc-da-50mm-f-1-8-lens-review-20006

This time the samples seem to be look better than those of the last review at Optyczne.pl. The measurbation results seem to be better than what SLRGear measured and found also.

However, I discovered an obvious quality issue (minor or not) from the outside appearance of the lens under test at my first glance. That is, the white painting of the "focusing" mark (but which points to *nothing* for this lens design!) spilled over in the front and too much paint was applied at that position in the factory, resulting in a rather uneven white line. Indeed, this little error causes the lens looks cheaper which gives an even poorer impression on the build quality and QC of the lens! >:-o

Tuesday, September 11, 2012

A Dark Day for Pentax and Users

Two years have been passed since the last Photokina and the launch of the original K-5. But it seems that Pentax has never been able to get through some numbers, as if there are some kinds of devil's curses applied! >:-(

1. The "flagship" DSLR model is not able to get through the model number of "5", there is no K-3 nor K-1 (an imagination of these can be found here), not even to mention!

2. After 10 years of development of the SAFOX since the original SAFOX VIII, the number of AF points still stay at 11! Really sad! And WHY? Is it really so difficult to add a few more AF points? Do note that the ten-year old SAFOX VIII can focus down to -1EV low light already. So, the -3EV actually doesn't mean any big improvement! Pentax should improve their AF system in other major areas that they are lagging farther and farther behind!

3. They have not yet passed through 16 Mega for the pixel count. And the same old Sony sensor (with different revisions) is re-used and re-used again across the board, since the K-5, and then to K-01, to K-30 and now the K-5II/s.

4. Their sensor size could never pass through 24 x 16mm, i.e., APS-C, for all the K-mount cameras, which is the saddest thing in the Pentaxland, as the K-mount *was* meant to be 36 x 24mm!

5. The Image Processor used in their flagship will never pass through the second generation, i.e., PRIME II!

6. 180! 1/180s is the fastest X-sync speed Pentax could ever achieve for their DSLRs! In fact, the so-called Pentax flagship models are even slower than the bottom of the line Canon Rebels including their cheapest EOS 1100D which has a faster speed of 1/200s for the X-sync! Do also note that this speed does not only mean the fastest synchronisation speed for flash, but it also indicates the speed for the shutter to complete its whole movement. It is always desirable to have a higher speed of this as possible, so as to minimise the rolling shutter effect for fast moving objects, even if a higher Tv is chosen. For more technical information, read these old PZ articles here and here.

Other silly things about the K-5II/IIs and for other new products that have been announced as well:-

1. There is no detailed information about the AF sensor layout of the SAFOX X. Just in case if the central sensor is changed from a f/5.6 to f/2.8 sensor only but not double crossed, it will be tricky. That says when the lens is opened at near f/2.8, the AF will be more accurate, but now the AF accuracy at smaller apertures and stopped down is affected and is not that accurate, thus the final resolution is decreased even though the DoF has hidden the evil. In fact, the focusing error is still there, but just not as obvious owing to the greater DoF. For more technical information and references, read my previous technical article with some explanations here.

Bottom line: Unless there is a double crosses for the central AF point, one cross for f/2.8 and the other for f/5.6. This kind of implementation will yet be lame! If it is true, it will be worse than the AF system used in the entry level EOS 650D by Canon.

2. About the "air-gapless" LCD screen/monitor: Pentax is really wise enough to remove the outer transparent window at the rear of the body and then show the LCD bare and then called it "air gapless"! They are really brilliant! Now, the K-5II screen is just like a computer desktop mon! That must be great! Well, who steals the protective windows at the new bodies? Do you really want to be one of the mice whom have their cheese stolen by someone?! :-o

3. What is the meaning of removing the AA filter of such a low resolution camera at 16MP only? It has no point of any at all. Many moire patterns will appear in images for high spatial frequency objects and the overall resolution is drastically decreased. When Pentax is not observing the basic Nyquist rule for digital sampling, Nyquist is pissed off, even he is in the Heaven! >:-|

Come on, unless you think that your existing DA lenses are resolving lower than that dated 16M low resolution sensor (by the current standard), problems will arise!

4. The re-badged Tamron 18-270 "Pentax" version obviously looks rather like a Tamron than a Pentax DA. Pentax is not even bother to change its aesthetic look. In practical terms, it is not weather sealed neither and is to be sold at a considerably higher price than the original DA18-135WR, which is plain stupid and ridiculous! Since almost everything is the same, why not just buy the original Tamron and save some money at all?

5. To completely replace the name of SMC by HD is committing suicide for Pentax! SMC is one of the TOP reasons for *WHY PENTAX* in the hearts of many Pentaxians for decades! Those Ricoh guys seem to have no strong mind about Pentax' history and what they should keep and maintain after all! IMO, naming it as HD SMC would be a much better marketing approach, just like what Pentax did for their "Ghostless SMC" nomenclature!

6. The new Qs are now more colourful, but they are made of plastic now. Metal alloy is aborted and I am sure the Q10 will feel cheaper in hands. Yet still putting a 1/2.3" sensor into it means that Pentax is making the same mistake of the original Q, which has not been selling well since it was launched owing to this major shortcoming and non-sense, which put many people off even they were attracted by the look and user-friendliness of the Q.

Frankly, today is really a dark day for Pentax and her users. Some fanboys must then start to jump on my head then, but what they do will not change all the facts as mentioned above! And I am sure that many existing Pentax users will support my views, on the other hand! :-)

I thought that Ricoh would do Pentax a favour and make better things and should have at least some breakthroughs to show us in this Photokina! But all my hopes (I believe for many other Pentaxians as well) have been in vain! The good thing is that I can continue to use my K-5 and original Pentax lenses, which I quite like for my own collection. Now I am decided, as it is quite easy to do so, I shall spend my future money into the Canon system for more glass and will not need to think again for what to buy any new Pentax gear! Pentax/Ricoh is really helping me to save my money, which could be used to buy other better things! My BIG Thanks, PR! >:-[

Monday, August 06, 2012

My Practical Review on the DA18-135



As we all know, this lens received rather poor rating and adverse comments at the PhotoZone and then the official early samples posted by Ned Bunnell did look bad either.

But then stupid fanboys of Pentax like me are actually irrational ;->, I went bought this lens regardless of the poor reputation of this lens all over the Internet! :-o

This time, I am going to write a practical review on the lens, with more real-life photos of mine shown, for what this lens can deliver, on a K-5. You will see how "poor" this lens could be!~

First of all, still some comments of mine in words. As you can see from the above modelling photo, this lens is really compact and lightweight. It has an internal focusing mechanism such that the length of the lens will not change during focusing. And of course, the front element will not rotate.

I am much impressed with the build quality of this lens, which is the best amongst all DA Pentax standard zoom lenses that I have ever used, I would say. Even the bundled lens hood is better built than most of other Pentax', with matted lining inside and the rugged texture outside which contributes to a solid feeling. At the beginning, maybe owing to the weather sealing, when the lens was first opened brand new out of the box, it is very tight to zoom. But then after the first few days of use, the friction and resistance became just right provided that it is not zoomed too fast and too quickly otherwise higher resistance can still be found.

Speaking of the DC motor and its AF performance on K-5, it is fast, moderately accurate and silent although it is not completely silent and some very small sound can still be heard in really silent environments (ditto for the new Canon STM, which I also have). Under the Live View mode and with this DC lens, the LV CDAF is obviously faster than with other conventional type Pentax AF lenses.

Now, let's come to the IQ part, this lens is quite sharp in the image centre throughout the whole zoom range and from wide-opened, here are some various samples (Click to download in Large size, EXIF preserved):-


(18mm, f/3.5)


(18mm, f/5.6)


(18mm, f/6.7)


(21mm, f/4)


(21mm, f/8)


(28mm, f/4)


(36mm, f/4.5)


(36mm, f/6.7)


(36mm, f/8)


(40mm, f/7.1)


(53mm, f/6.3)


(100 mm, f/5.6)



(135mm, f/5.6)

It can be noted that the extreme corner softness is only existent at the widest side at 18mm. From 21mm and onwards, the effect is considerably eliminated and is not that noticeable. Distortion is significantly decreased, too.

In general, images produced are with good colours and contrast. Resolution is high throughout the frame except at the extreme focal ends, i.e., 18mm and 135mm. I do note that my lens' optics are perfectly centred by judging from the vignetting pattern, nevertheless. Maybe I am just lucky enough.

The flare resistance is superb. Look at this:-



The bokeh of this lens is not bad, look at these two (and also some of the above samples with a blurred background):-



Round bokeh of highlights can be seen.



Btw, why to use Live View with a DSLR? (I can see many DSLR beginners have been doing this!) Why not just use a K-01 if so?! :-o

There is one minor problem of this lens (or maybe the Pentax DSLR system in general), it is that it has a slight underexposure tendency, a +0.3/0.5 exposure compensation would usually cure it.

Besides, the Pentax SR system for tele-lens is proven to be ineffective, once again. I have got quite some blurred photos when shot at 135mm, just because the lens speed is slow but SR didn't help:-



All in all, I am quite satisfied with my copy of the DA18-135. It seems that my lens has far better performance than what is shown in the various measurbation tests and I do believe that it is a lens that performs well in real world but not so for measurbations. This maybe owing to the inconsistency quality control (or lenses are actually classified into different quality classes and batches - mine was purchased separately). The other possibility is that the optical design of this lens is not optimised for close range objects, where a test chart is placed and shot.

At the end of the day, this travelling zoom will not give you stellar optic quality which primes could give which is well expected, After all, let's see if my "favourable" review this time could retrieve the confidence of some potential buyers of this lens and maybe also for Pentax the brand as well! ;-D


Related:-

Interview with the Optical Engineer/Designer of the DA 18-135 Lens

Thursday, July 12, 2012

How a DSLR is Made? (Video)


URL: http://www.youtube.com/watch?v=Lkv0Sc2MxP8

This is for the Canon 7D btw.


Related:-

Videos: Nikon AF-SLR Manufacturing Process (for F70)

Leica Lenses Manufacturing Process

A Virtual Lens Plant!

Wednesday, July 11, 2012

Pentax Weapon Used by an US Soldier at Afghanistan



See: http://www.diyphotography.net/are-pentax-cameras-that-weather-proof



Full links of the galleries of the soldier posted at Pentax Forums, via Photoblog.hk.