The K-mount lens roadmap has silently been updated the day before:
http://www.ricoh-imaging.co.jp/japan/products/lens/images/K_Mount_Lens.pdf
It can be seen a new 70-200mm (roughly) Star lens in an unknown line newly appears. It is not a DA* lens because if it is a DA* its name should have been shown as the names of the other new DA lenses that are already shown there.
However, this might be another vapour or paper-ware that we need to wait for another year as it is the thing that we would see in 2014 or later. And, it does not even have the very basic information of the lens including its exact focal range and aperture. And, is it yet an APS-C lens or in 135 Full Frame? Shall we know? But When?
Saturday, May 24, 2014
Wednesday, May 07, 2014
DA70 Limited, FA77 Limited, and A*85 are of the Same Gene
First, have a look on these optical construction:
DA70/2.4:
FA77/1.8:
A*85/1.4:
So, the optical design of FA77 and A*85 are very close enough, with the same 7 elements in 6 group configuration. It is quite obvious that the FA77 is a miniature of the A*85, only with some minor modifications. And then the DA70 is yet another simplified version of the FA77, with one close-to-rear element omitted. So, everything are of the same Pentax gene actually. Indeed, when I first used my DA70 on my Pentax DSLR, I did feel the extraordinary film taste of it for its very good 3d feel and colour rendering, unlike other DA lenses that I may not that like.
Reference Links:
http://www.bdimitrov.de/kmp/lenses/primes/short-tele/index.html
http://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/2959-fa-85mm-f-1-4-vs-limited-77mm-f-1-8-a.html#post23940
DA70/2.4:
FA77/1.8:
A*85/1.4:
So, the optical design of FA77 and A*85 are very close enough, with the same 7 elements in 6 group configuration. It is quite obvious that the FA77 is a miniature of the A*85, only with some minor modifications. And then the DA70 is yet another simplified version of the FA77, with one close-to-rear element omitted. So, everything are of the same Pentax gene actually. Indeed, when I first used my DA70 on my Pentax DSLR, I did feel the extraordinary film taste of it for its very good 3d feel and colour rendering, unlike other DA lenses that I may not that like.
Reference Links:
http://www.bdimitrov.de/kmp/lenses/primes/short-tele/index.html
http://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/2959-fa-85mm-f-1-4-vs-limited-77mm-f-1-8-a.html#post23940
Pentax DA 1.4X TC Review by PF
http://www.pentaxforums.com/reviews/pentax-da-14x-aw-af-rear-converter/introduction.html
As usual, those test images by PF guys are somewhat crappy as photos. However, these are good enough for the readers to judge on the image quality and all the differences, if any, when compared with other products. Do bear in mind to judge on the test samples yourself but not rely totally on the words made with their comments nor even with the ridiculous high marks given by them, which should be the better way to go for getting more meaningful conclusions of yours. :-D
As usual, those test images by PF guys are somewhat crappy as photos. However, these are good enough for the readers to judge on the image quality and all the differences, if any, when compared with other products. Do bear in mind to judge on the test samples yourself but not rely totally on the words made with their comments nor even with the ridiculous high marks given by them, which should be the better way to go for getting more meaningful conclusions of yours. :-D
Tuesday, May 06, 2014
SDM Still Sucks!
http://www.dpreview.com/forums/post/53455111
http://www.dpreview.com/forums/post/53621691
Seven years lapsed since the first SDM lens was born. However, the complaints from SDM users never ended and the brand name suffers. Well, is it really so difficult to cure such a design problem? Oh really?? >:-(
http://www.dpreview.com/forums/post/53621691
Seven years lapsed since the first SDM lens was born. However, the complaints from SDM users never ended and the brand name suffers. Well, is it really so difficult to cure such a design problem? Oh really?? >:-(
K-3 IR Review
http://www.imaging-resource.com/PRODS/pentax-k3/pentax-k3A.HTM
Same as what DPR said, colour inaccuracy is below average and is yet a problem.
Performance wise, the K-3 is slow in shutter lag, which is close to 1/10 second fastest, and is actually worse than that of the original K-7/K-5.
Same as what DPR said, colour inaccuracy is below average and is yet a problem.
Performance wise, the K-3 is slow in shutter lag, which is close to 1/10 second fastest, and is actually worse than that of the original K-7/K-5.
Sunday, April 27, 2014
Using Dual Card Slots of K-3 Means Half Writing Speed (i.e., 2X Slower)
See this quick test:
http://www.pentaxfans.net/thread-144953-1-1.html
(in Traditional Chinese, Google English translation here.)
The two SD cards used by that K-3 owner is a high-speed Sandisk Extreme SDHC UHS-I 32GB, both are of the same model and identical.
http://www.pentaxfans.net/thread-144953-1-1.html
(in Traditional Chinese, Google English translation here.)
The two SD cards used by that K-3 owner is a high-speed Sandisk Extreme SDHC UHS-I 32GB, both are of the same model and identical.
Tuesday, April 15, 2014
Bad Colour Response of the K-3 (and my Possible Solution)
http://www.dpreview.com/reviews/pentax-k-3/12#Colour
DPR couldn't find an acceptable better setting even though they had tried their best to fiddle around with many in-camera colour settting parameters but in vain.
However, there might be a workaround I previously found out and proposed. I don't know if it could work for the K-3 or as it is notorious that the K-3 had even worse colour response than the K-5. But if you are a K-3 user, you can try anyway and tell me your results when my settings are applied:
My Best Optimal Custom Image (Colour) Setting Combination for the Later Pentax Digital Bodies
As for that crappy JPEG engine and sharpening issue, I think there is not much to do and deal with unless RAW is shot.
DPR couldn't find an acceptable better setting even though they had tried their best to fiddle around with many in-camera colour settting parameters but in vain.
However, there might be a workaround I previously found out and proposed. I don't know if it could work for the K-3 or as it is notorious that the K-3 had even worse colour response than the K-5. But if you are a K-3 user, you can try anyway and tell me your results when my settings are applied:
My Best Optimal Custom Image (Colour) Setting Combination for the Later Pentax Digital Bodies
As for that crappy JPEG engine and sharpening issue, I think there is not much to do and deal with unless RAW is shot.
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