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Sunday, January 15, 2017

New Fast Primes for K-1


Credit: http://i.imgur.com/m6XvbPd.jpg

Since K-1 was marketed last April, we wanted newly designed original fast Pentax prime lenses. But there is not even one Pentax fast prime ever announced nor marketed (of course). Does it sound like that Pentax (actually Ricoh) is no longer be able to design and produce new prime lenses by herself these days? :-(
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cola's avatar

cola · 428 weeks ago

A autofocus (!) 50/1.2 or faster is with this bajonett diameter NOT possible.
3 replies · active 428 weeks ago
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Mistral75's avatar

Mistral75 · 428 weeks ago

Why wouldn't an autofocus lens be possible whilst a manual focus one is?
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joergens.mi's avatar

joergens.mi · 428 weeks ago

When 1.2 can be seen on the sensor, it can also built into the phase-detection, but this would require a much bigger PD-chip on the floor of the camera.

On the other hand, is it useful to autofocus at 1.2 except for still objects - every movement - object or photographer - will change the focuspoint. How will you calibrate such a sensitive system. How will you correct the faults in the camera - you need finer steps in the correction path.

With still objects I get a better focus with liveview and 16x
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Mistral75's avatar

Mistral75 · 428 weeks ago

I agree you need a precise focus system to nail focus a 50mm f/1.2 but there is no impossibility there, contrary to what cola wrote.

Besides, lenses such as a 85mm f/1.2, a 135mm f/1.4 or a 200mm f/2 have an even thinner depth of field than a 50mm f/1/2, yet modern DSLR autofocus systems are perfectly able to nail and keep focus with such lenses, even though their most precise focus points have a rangefinder base that corresponds to f/2.8.
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6x7's avatar

6x7 · 428 weeks ago

Ricoh knows wat to make because they are on the road map, but I also wondere if it will be another set of Tamrons SP 35 /45/ 85 1.8?
I am personally interested in a AF wide angle 15 / 20 mm and a replacement for the limited 43mm 1.9 the coating is horrible and the foreground bokeh is extremely rough.
8 replies · active 428 weeks ago
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Stefan's avatar

Stefan · 428 weeks ago

Sure. Why shouldn't it be that way? Great Lenses. Ready Tor Go. Just add some weathersealing and Pentax HD-Coating, That' it.

I'm quite happy with my 2.8/35 and my 10-17. Both are no 'pure' Pentax Designs...
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Mistral75's avatar

Mistral75 · 428 weeks ago

Yes they are. Licensed to Tokina but patented by Pentax.
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Stefan's avatar

Stefan · 428 weeks ago

Since Jun Hirakawa was 'forced' to Tamron by Hoya (as far as I read) it now is the other way around. Does it do any harm? I suppose no.
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Stefan's avatar

Stefan · 428 weeks ago

Bad Thing: Neither Tamron, nor Tokina or Sigma is investing very much in new Lenses for PK....
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ToetSFX's avatar

ToetSFX · 428 weeks ago

Important is a fast 28mm Pentax original FF lens
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RiceHigh's avatar - Go to profile

RiceHigh 110p · 428 weeks ago

I have a Japanese made FA28 prime which performs very well on my K-1. :-)
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ToetSFX's avatar

ToetSFX · 428 weeks ago

That seems like a nice lens! Unfortunately I don't have this lens ........
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ToetSFX's avatar

ToetSFX · 428 weeks ago

For 28mm the only possibility is APS-C with 18-55 (27-82,5). The new FA zooms 24-70 / 28-105 are too big/heavy or not fast enough (and expensive)
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best primes's avatar

best primes · 423 weeks ago

RH, did you see this? www.ebay.com/itm/Rare-Pentax-FA-200mm-f-4-ED-Macr...
FA*200 macro. I haven't seen one in years. Only $1887 and sold quick. This wasn't even posted at DPR or PF forums.
Does this mean a new 200m macro is coming?
1 reply · active 423 weeks ago
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RiceHigh's avatar - Go to profile

RiceHigh 110p · 423 weeks ago

Possibly nope.

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