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View Poll Results: Would you buy a Pentax Full Frame DSLR?
Yes 15277.95%
No 4322.05%
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05-14-2013, 05:25 PM   #196
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Another problem with FF..For the moment Pentax Aps-C is more or less supported by third party (Sigma and Tamron) ... If for some reasons you invested in this kind of lenses they will not compatible with FF because of APS-C only design..
I bet there are just as many FF PK mount lenses as APS-C PK mount lenses available.

05-14-2013, 05:30 PM   #197
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QuoteOriginally posted by jogiba Quote
I bet there are just as many FF PK mount lenses as APS-C PK mount lenses available.
As noted previously, the APS-c Pentaxes can use all those lenses, plus the APS-c only lenses. An APS-c pentax can use any Pentax K mount lens ever made. It will not be the case for the coming FF. But not to worry... I could buy a Pentax k mount FF today and still be happy with what I have to put in it, as long as it comes with a standard type 24-70 type zoom.
05-15-2013, 01:10 AM   #198
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QuoteOriginally posted by jogiba Quote
I bet there are just as many FF PK mount lenses as APS-C PK mount lenses available.
I am refering to new lenses with AF system like Sigma 17-50 2.8, Tamron 17-50 2.8,The Cheap Pentax WR's and also the 18-135..
05-15-2013, 01:36 AM   #199
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QuoteOriginally posted by normhead Quote
As noted previously, the APS-c Pentaxes can use all those lenses, plus the APS-c only lenses. An APS-c pentax can use any Pentax K mount lens ever made. It will not be the case for the coming FF. But not to worry... I could buy a Pentax k mount FF today and still be happy with what I have to put in it, as long as it comes with a standard type 24-70 type zoom.
Any Pentax K-mount camera should be able to use any Pentax K-mount lens. With a Pentax FF DSLR you should be able to use all K-mount lenses, and get the FOV they all where designed for. APS-C lenses will be used in APS-C mode and FF lenses in FF mode, but you can probably also use FF lenses in APS-C mode too (and hopefully also APS-C lenses in FF mode).

So IMO a Pentax FF DSLR has better support of FF and APS-C lenses than a APS-C DSLR.


Last edited by Fogel70; 05-15-2013 at 01:46 AM.
05-15-2013, 01:57 AM   #200
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if you mount Aps-C lenses on FF there will be big vignetting problems right ?Another thing will be Pentax FF will come with a new mount and in this case things change dramatically..
05-15-2013, 02:19 AM   #201
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QuoteOriginally posted by badsykes Quote
if you mount Aps-C lenses on FF there will be big vignetting problems right ?
Not if used in APS-C mode (like on a APS-C camera). If using the lens in FF-mode it will be vignetting problem on some lenses, but it depends on how large image circle the lens got. Some of Pentax APS-C lenses have FF image circle (or very close to it).
05-15-2013, 05:04 AM   #202
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QuoteOriginally posted by badsykes Quote
if you mount Aps-C lenses on FF there will be big vignetting problems right ?Another thing will be Pentax FF will come with a new mount and in this case things change dramatically..
The FF Pentax will be dead meat if it does not have a K-mount.
05-15-2013, 05:05 AM   #203
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QuoteOriginally posted by normhead Quote
It will not be the case for the coming FF.
Why? The competitors have a crop mode on their FF cameras for APS-C lenses...it would be smart for Pentax to do the same. That way they can sell you both types of lenses. Also, you have a built in user base.


Last edited by cali92rs; 05-15-2013 at 05:23 AM.
05-15-2013, 05:48 AM   #204
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QuoteOriginally posted by Fogel70 Quote
Not if used in APS-C mode (like on a APS-C camera). If using the lens in FF-mode it will be vignetting problem on some lenses, but it depends on how large image circle the lens got. Some of Pentax APS-C lenses have FF image circle (or very close to it).

The idea is nice indeed..This APS-C mode is very intersting...
05-15-2013, 07:18 AM   #205
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QuoteOriginally posted by badsykes Quote
if you mount Aps-C lenses on FF there will be big vignetting problems right ?
Yes and no. The DA 14mm F/2.8 will vignette wretchedly wide open. The DA*300 mm will be fine.

Generally the primes at or above 40mm won't have 'bad' vignetting on FF. Sharpness in the corners is still TBD.

None of the zooms will be OK. I'd still shoot the 60-250 and 55-300 in FF mode and crop later.

QuoteOriginally posted by badsykes Quote
Another thing will be Pentax FF will come with a new mount and in this case things change dramatically..
I don't think any mount for FF would change things much. First off, the K-mount supports FF. Second, if Pentax wanted to change mounts, they know they would have to provide very good support to existing lens users. I think they know that if things change a bunch their market share is going to plummet.
05-15-2013, 07:41 AM   #206
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QuoteOriginally posted by ElJamoquio Quote
Generally the primes at or above 40mm won't have 'bad' vignetting on FF. Sharpness in the corners is still TBD.
You can extend that to "at or above 31mm" (which is an FF lens), since the DA35/2.4 works fine on FF and the DA35 Ltd. only vignettes very slightly at distance (not at macro distances).
05-15-2013, 07:59 AM   #207
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QuoteOriginally posted by cali92rs Quote
Why? The competitors have a crop mode on their FF cameras for APS-C lenses...it would be smart for Pentax to do the same. That way they can sell you both types of lenses. Also, you have a built in user base.
I use APS-C mode lenses on my Sony NEX-VG900 in APS-C mode with no vignetting or FF lenses in FF mode .
05-15-2013, 09:55 AM   #208
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QuoteOriginally posted by gazonk Quote
You can extend that to "at or above 31mm" (which is an FF lens), since the DA35/2.4 works fine on FF and the DA35 Ltd. only vignettes very slightly at distance (not at macro distances).
Yeah, I was thinking the DA 35mm Limited Macro failed that test.
05-16-2013, 05:33 AM   #209
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I would sell my granny for a Pentax full frame camera.
05-16-2013, 08:39 AM   #210
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QuoteOriginally posted by Ayefaye Quote
I would sell my granny for a Pentax full frame camera.
There is many ways to finance a new camera.
I think I would prefer a more traditional method.
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