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11-11-2010, 10:16 AM   #1
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Any ideas why pentax does not make a 50mm 1.2 anymore?

See title. I would think it would be a popular lens... maybe even a good limited?

11-11-2010, 10:27 AM   #2
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It would need a redesign to add AF and it could be that it actually is too expensive for the amount of R&D verses sales predictions. Also there are compliance issues with the current version in the EU due to metal restrictions so a reskin is ruled out as well.
11-11-2010, 12:12 PM   #3
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BTW, i believe it's still made - just special order.
Also, matsuiya store on eBay occasionally sells em.

I'm fortunate in that I was able to buy one relatively cheaply.

Guess you mean an AF version?
My guess is reluctance to ensure focus at f1.2 - DOF is very thin.
11-11-2010, 12:19 PM   #4
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Yes I meant an autofocus version. I just figured... it's so valued in the used market, Pentax could easily make an AF 1.2 and sell it to all sorts of people who would prefer modern design / autofocus + quickshift, etc.

Just curious is all. I would think the 50 1.2 would make for a killer FA/DA limited, and would be different enough from the FA 43 to earn it's own spot?

I'm sure it has crossed their minds already, though .

11-11-2010, 01:39 PM   #5
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This is easy. Pentax aimes to make money.
They don't think it will generate any income. Same as why a bunch of other lenses are discontinued/not updatet to AF.
11-11-2010, 03:01 PM   #6
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QuoteOriginally posted by bfo Quote
This is easy. Pentax aimes to make money.
They don't think it will generate any income. Same as why a bunch of other lenses are discontinued/not updatet to AF.
Probably true, considering that sensors keep getting better and better at low-noise high ISO, dynamic range is improving (we're getting really close to film now in our ability to push/pull RAW files), which offsets a lot of the advantages for f/1.2 from a low light/available light photographic tool, and reduces is to an artistic tool for very select DoF, which I imagine is a narrow audience. On top of that, to properly launch an AF f/1.2 lens means you need to have lens-specific per-aperture variable focus compensation, or at least the ability to dial that specific type of compensation in on the body, to properly handle focus shift. And even when you have all that in place, imagine the potential frustration of using an AF lens at f/1.2 when focus point selection (automatic or manual) is so incredibly critical to composition... there are scenarios where AF would be more a hindrance than a help at f/1.2.
11-11-2010, 03:05 PM   #7
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Also, 50mm was the old "normal" lens... on today's APS-C sensors it is a mild telephoto. Now a 35mm f1.2... that'd be something to consider...

Mike
11-11-2010, 03:13 PM   #8
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QuoteOriginally posted by MRRiley Quote
Also, 50mm was the old "normal" lens... on today's APS-C sensors it is a mild telephoto. Now a 35mm f1.2... that'd be something to consider...

Mike
I'd be curious to see the size and price of that! Both would sure be "large"


Also consider the CMOS sensor issues with large aperture lenses for a reason why a newer AF version isn't made in addition to the other reasons everyone has given.

11-11-2010, 03:58 PM   #9
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QuoteOriginally posted by lowspark86 Quote
I'd be curious to see the size and price of that! Both would sure be "large"

....
Here's a peek at a Manual Focus version: M 35/1.4 .....albeit it is only f1.4

Voigtlander makes a 35mm f1.2 but it is Leica M mount only so I'm not sure if the size is relative : Voigtlander 35/1.2

At one time IIRC, Pentax had a "fast" DA30 on their lens roadmap - I think it got axed somewhere down the line and I haven't heard nor seen any more discussion about it - probably to protect the mystical FA Limited 31mm f1.8
11-11-2010, 04:11 PM   #10
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Actually, Pentax did make a batch or 2 over the past few years of the A 50/1.2. The were assembled in Vietnam. However, they are only available new in Japan or Hong Kong at the tune of $900+
11-11-2010, 05:55 PM   #11
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QuoteOriginally posted by Blue Quote
Actually, Pentax did make a batch or 2 over the past few years of the A 50/1.2. The were assembled in Vietnam. However, they are only available new in Japan or Hong Kong at the tune of $900+
Yikes! I suppose it makes sense if they don't think they will sell. Just curious .
11-11-2010, 11:24 PM   #12
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For the two main reasons previously mentioned in this thread:

1) 50mm is a “normal” focal length on a film camera, not on an APS-C sensor.
2) Cost, F1.2 makes for a heavy expensive lens. Now add AF for today’s DSLRs, this would be tough to do in today’s “all plastic” lens world.

Phil.
11-11-2010, 11:55 PM   #13
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two words:

Autofocus Accuracy
11-12-2010, 10:31 AM   #14
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QuoteOriginally posted by PentHassyKon Quote
Guess you mean an AF version?
My guess is reluctance to ensure focus at f1.2 - DOF is very thin.
QuoteOriginally posted by Digitalis Quote
two words:

Autofocus Accuracy
Digitalis - that's exactly what I was thinking. Take a look at post 555 from robbiec in this thread: https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/74819-post-you...ml#post1258526

Maybe today's generation of cameras (K-5, K-r) can accurately focus for that shot?
11-12-2010, 10:39 AM   #15
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+1 for Digitalis.
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