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03-22-2012, 06:43 PM   #1
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New DA 25mm

Apologies, if this is'nt new news (was to me): Pentax launches medium format all-weather prime - Imaging Resource

03-22-2012, 06:59 PM   #2
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This is strange. I thought that a D-FA version of this lens has already been on sale for a few months. What the point of this "new" DA version when its apparently now only compatible with the 645D (unlike the D-FA which was said to be compatible with the film cameras) and costs and looks very similar? confusing indeed..
03-22-2012, 07:02 PM   #3
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Probably the same naming mixup as when they named the 35mm "DA" rather than "DA L". It was known as the D-FA until now...

http://www.bhphotovideo.com/c/product/755829-REG/Pentax_26360_Pentax_D_FA_645.html

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03-22-2012, 07:47 PM   #4
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Interesting. Pentax is now saying it cannot be used on the film bodies. This is a redesign for only the 645D. The barrel shape is different from the F DA model--look at the front. How cosmetic the design is, I am unsure.


Last edited by Yamanobori; 03-22-2012 at 07:52 PM.
03-22-2012, 08:10 PM   #5
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QuoteOriginally posted by Adam Quote
Probably the same naming mixup as when they named the 35mm "DA" rather than "DA L". It was known as the D-FA until now...

Pentax smc Pentax D FA 645 25mm f/4 AL (IF) SDM AW Lens 26360
Not the same lens.
03-22-2012, 10:57 PM   #6
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What is bizarre is the the D-FA version has been on sale for a few months outside of the US, why did they release a redesign so soon??
03-23-2012, 01:11 AM   #7
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The new 55 was introduced along with the DA*55 for APS-C sensors - while looking similar, aperture and designation (wide angle vs. portrait) are quite different. I am just hoping for a APS-C clone of the 25 mm lens.
25 mm lenses for retrofocus medium format cameras are rare and typically not of great quality... I understand frequent updates.
03-23-2012, 01:29 AM   #8
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I wonder if this updated version covers the full 645 frame (in case of a full frame 645 sensor in the future)... And, if so, why it would not be compatible with film bodies.

03-23-2012, 02:30 AM   #9
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D-FA isn't quite compatible either. They lack aperture rings, and the 645 film cameras can set aperture electronically if in shutter priority mode, but not otherwise.

No, I fear this is a move by pentax to discard full frame compatibility altogether, which confuses me, because I can't think they'll make much money from it.
03-23-2012, 04:58 AM   #10
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I read somewhere that the lens hood is now designed to cover the cropped sensor of the 645D, rather than the FF. That may influence flare-resistance of course.

More ominously, perhaps the move implies that plans for a FF sensor have been shelved.
03-23-2012, 05:00 AM   #11
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an other link: Kommt: Pentax smc DA 645 4/25 mm AL [IF] SDM AW | photoscala
03-23-2012, 05:57 AM   #12
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QuoteOriginally posted by Ayoh Quote
This is strange. I thought that a D-FA version of this lens has already been on sale for a few months. What the point of this "new" DA version when its apparently now only compatible with the 645D (unlike the D-FA which was said to be compatible with the film cameras) and costs and looks very similar? confusing indeed..
No imho:
DFA = sold only in Japan for Ptx645D and analogue Ptx645 (N, NII) (4.5x6 cm)
DA = sold in the RoW (rest of the world) , croped, only for 645D , price in Germany 4800 (incl VAT)
03-23-2012, 06:14 AM   #13
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QuoteOriginally posted by veraikon Quote
No imho:
DFA = sold only in Japan for Ptx645D and analogue Ptx645 (N, NII) (4.5x6 cm)
DA = sold in the RoW (rest of the world) , croped, only for 645D , price in Germany 4800 (incl VAT)
Don't think it will be as expensive as that UK price 3700
03-23-2012, 06:20 AM   #14
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QuoteOriginally posted by zapp Quote
25 mm lenses for retrofocus medium format cameras are rare and typically not of great quality... I understand frequent updates.
???? None of Pentax's competitors have updated their wides and their wides have a great reputation. Did you get a D FA 25mm for your 645D?
03-23-2012, 07:17 AM   #15
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It makes a bit more sense now:

"Changes or improvements to the predecessor model:
Due to the high manufacturing effort for a lens with an image field illumination for the analog Pentax 645 system has decided to offer this focal length in two variants.

Option 1 - DFA 645 25 mm due to the large spread of the analog 645 system exclusively for the Japanese market

Option 2 - DA 645 25 mm, this lens is intended for distribution outside of the Asian market"
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