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02-10-2017, 02:47 PM   #16
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QuoteOriginally posted by Sandy Hancock Quote
That is what a petal hood looks like. Take shots with the hood off if you want to convince yourself that the DA50-135 might work as a FF lens (which you can't, because it doesn't - at any focal length or distance).
Good catch about the hood.I was wondering why so many of the shots on that page had vignetting with the same pattern. Well duh!

02-10-2017, 04:37 PM   #17
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I'm not convinced it's the hood. Just get a different hood, problem solved? Can't be that easy.
02-10-2017, 05:03 PM   #18
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Fantastic lens. I happily use it in crop mode.

02-10-2017, 06:26 PM - 1 Like   #19
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QuoteOriginally posted by D1N0 Quote
I'm not convinced it's the hood. Just get a different hood, problem solved? Can't be that easy.
It IS the hood.
However, the DA*50-135 is still NOWHERE NEAR a full frame lens even without the hood. Just move on.

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02-11-2017, 02:51 AM   #20
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No need being rude
02-11-2017, 09:44 AM   #21
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QuoteOriginally posted by D1N0 Quote
No need being rude
It was empirical, accurate, and perhaps a little blunt. But not rude.

I would not have stated in my earlier post that it was due to the hood unless I *knew* that it was due to the hood. I could just as easily take offence at your dismissal of my earlier comment, but I would rather counter that with evidence rather than chagrin.

To repeat, the DA*50-135 is a brilliant crop lens, but it is not full frame compatible by any stretch of the imagination.

Last edited by Sandy Hancock; 02-11-2017 at 10:02 AM.
02-11-2017, 11:10 AM   #22
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Telling people to move on is rude. period!
02-11-2017, 12:40 PM   #23
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I just removed the hood and went out in the back yard for some quick shots (no tripod or precise alignment) and pulled jpegs right out of the camera at 50mm and 135mm. The odd shape was definitely the hood. OTOH, honestly, while there is significant vignetting (especially at 50mm), it looks far better than I expected. There is definitely more high quality image available there than fits in 16mmx24mm, and it might be worth using with the K1 FF setting at the longer settings.

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Last edited by GeneV; 02-11-2017 at 06:40 PM.
02-11-2017, 04:09 PM   #24
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The other issue with using it with FF is that the SR causes the vignetted region of the image to increase if it is compensating for movement. Again, you can probably crop to get a pretty decent image out.
02-11-2017, 06:46 PM   #25
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QuoteOriginally posted by HarisF1 Quote
The other issue with using it with FF is that the SR causes the vignetted region of the image to increase if it is compensating for movement. Again, you can probably crop to get a pretty decent image out.
Since my shots were hand held, and not too carefully taken, I would expect that whatever effect the SR would have was evident in those shots.
02-11-2017, 07:13 PM   #26
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Could you fly this thing in 1:1 crop? Maybe that got mentioned already.
02-12-2017, 08:10 AM   #27
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There used to be a couple zooms in the 50-150 or 75-150 range many years ago for film cameras - ff 35 mm cameras. This species died out with the arrival of 35-70 & 70-200 combos during film times. 2x zooms or even 3x ranging from normal to light tele did not sell well. I think only a macro zoom survived a little longer. That implis that 50-135 is not really an established zoom range in ff land.
In APS-land 50-135 resembles the FOV of a 70-200.
That means, you will probably not see a 50-135 for fullframe unless for very special purposes. Limited zoom range, but very large aperture / macro zoom.
The same FOV like a 70-200 but with f4 may be available at some point of time, but probably not soon. Pentax has some mroe urgend cases to solve first.

---------- Post added 12-02-17 at 04:16 PM ----------

QuoteOriginally posted by GeneV Quote
I just removed the hood and went out in the back yard for some quick shots (no tripod or precise alignment) and pulled jpegs right out of the camera at 50mm and 135mm. The odd shape was definitely the hood. OTOH, honestly, while there is significant vignetting (especially at 50mm), it looks far better than I expected. There is definitely more high quality image available there than fits in 16mmx24mm, and it might be worth using with the K1 FF setting at the longer settings.
Your EXIF data says that you used f/4. At f/2.8 vignetting will be worse and I doubt that image quality will be usable all the way towards the vigenitting zone.

I played with the 20-40 for panorama shots on K1, it is fun, but not serious. Vignetting and resolution fall off are quite visible.

Last edited by zapp; 02-12-2017 at 08:21 AM.
02-12-2017, 11:20 AM   #28
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QuoteOriginally posted by zapp Quote
There used to be a couple zooms in the 50-150 or 75-150 range many years ago for film cameras - ff 35 mm cameras. This species died out with the arrival of 35-70 & 70-200 combos during film times. 2x zooms or even 3x ranging from normal to light tele did not sell well. I think only a macro zoom survived a little longer. That implis that 50-135 is not really an established zoom range in ff land.
In APS-land 50-135 resembles the FOV of a 70-200.
That means, you will probably not see a 50-135 for fullframe unless for very special purposes. Limited zoom range, but very large aperture / macro zoom.
The same FOV like a 70-200 but with f4 may be available at some point of time, but probably not soon. Pentax has some mroe urgend cases to solve first.

---------- Post added 12-02-17 at 04:16 PM ----------



Your EXIF data says that you used f/4. At f/2.8 vignetting will be worse and I doubt that image quality will be usable all the way towards the vigenitting zone.

I played with the 20-40 for panorama shots on K1, it is fun, but not serious. Vignetting and resolution fall off are quite visible.
I did just grab the camera and shoot, and my program line is MTF so this batch does not incude F/2.8. I have shot walls with this lens wide open before on an A7R, and there was not much difference in the vignetting from about one stop down. The focal length makes far more difference. Corner sharpness isn't all that important to me at F/2.8, since I am usually using that setting to blur the background, so I am not sure how wild I would be about this lens if it were important.

If anyone is interested, I can do a more controlled test with a tripod and manual settings, but it is not that critical to me. I own a 70-200/2.8, so I don't see that I need to do more than just play around with this lens on FF. If I did not have any other 135, it looks like this would work.
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