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12-27-2014, 03:22 PM   #1
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So I put my DA*300 on my FF Pentax.

I took my DA*300 and put it on my old MZ-30 and was expecting alot of vignetting but in the view finder I do not see any. If putting a soft paper as film and pointing at a bright thing I do not see any noticeble vignetting there either. I am putting a Fuji Sensia 100ASA in it and I am going to use all my lenses on it the coming days to see how they do.

What am I missing here. This says to me that I will be able to use the lenses with a FF-camera whenever it comes or?

---------- Post added 12-27-14 at 11:31 PM ----------

My Tamron 17-50, Pentax 18-135, DA 10-17 between 10 and 14 gives me vignetting in the view finder...

12-27-2014, 03:35 PM   #2
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The DA*300mm is based upon/derived from a full frame lens: the FA*300m f4.5. One would not expect much vignetting.

There have been a couple of earlier threads on Pentax lenses and FF, the first one by PF member falconeye:
https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/31629-da-le...ts-thread.html

https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/280979-da-l...ull-frame.html
https://www.pentaxforums.com/forums/169-pentax-full-frame/275508-if-pentax-we...nses-work.html


On the other hand, the DA18-135mm and DA10-17mm were designed from onset for APS-C camera, not FF.

Hope that the comment may help.

Last edited by hcc; 12-27-2014 at 03:44 PM.
12-27-2014, 03:35 PM   #3
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There's a thread around here somewhere dedicated to testing DA lenses on 24x36 format.

The DA*300 has an FA antecedent, as some others do.

Ha, as hcc said...
12-27-2014, 03:40 PM   #4
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And here in pentaxforums

https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/31629-da-le...ts-thread.html



DA*300 YES


Last edited by Blue; 01-26-2015 at 10:02 AM.
12-27-2014, 03:57 PM   #5
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Original Poster
Thanks!
12-27-2014, 04:38 PM   #6
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Da*300

I have used it on my Sony A7II and there is no vignetting. It produces clean clear images on full frame. I am finding that many of the da lenses work fine on FF. Anything below 35mm seems to vignette a lot. The 35 macro is generally good with some light vignetting at some f stops. the 40 and 70 limiteds are excellent as is the DFA 100. Even the fisheye works around 14-16.
12-27-2014, 05:03 PM   #7
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According to this post the DA* 300 f4 was patented for use with a FF camera. https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/31629-da-le...ts-thread.html DA* 300mm F4 ED [IF] SDM: ++ (officially rated "designed for FF" by Pentax patent US7715116)

Read more at: https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/31629-da-le...#ixzz3N97iBd9v
12-27-2014, 05:46 PM - 1 Like   #8
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Another easy way to test for vignetting is to open up the back of your film camera and apply some matte tape across the film frame opening. Place the camera in bulb mode and open the shutter. If you see vignetting in the image projected onto the tape then know you will have vignetting on film. Viewfinders aren't always 100% views.

12-27-2014, 07:10 PM   #9
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Dear Mr Pentax,

That means all my Pentax lenses (43mm F1.9, 77mm F1.8, 200mm F2.8, 300mm F4) are FF. Can I please have a FF DSLR to go with them?

A 135mm F2ish would be nice too.
12-27-2014, 07:35 PM   #10
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Many...if not most FF lenses vignetted anyway. By design and economy.

The human vision system and out mind's perception actually cares little about corners. Corner sharpness was important, but less so in the film era than in the pixel-peeing one.
12-27-2014, 07:49 PM - 3 Likes   #11
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QuoteOriginally posted by Aristophanes Quote
pixel-peeing
Is that why some old glass has a yellow tint?
12-28-2014, 09:24 AM   #12
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We will have to see what sensor Ricoh goes with. The A7s plays well with most lenses, but the 36mp A7r has issues with quite a few FF lenses.
01-12-2015, 03:21 PM   #13
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QuoteOriginally posted by Winder Quote
We will have to see what sensor Ricoh goes with. The A7s plays well with most lenses, but the 36mp A7r has issues with quite a few FF lenses.
Oh man, just when I decided to get the R not the S. But the tax man keeps messing up my return. Well I should say, the tax software i used messed up the return. A very nice man over at Revenue Canada took an hour of this time to redo the parts the tax software didn't get right. Maybe by the time I get my tax return the Pentax FF will be released. Although I'm still not convinced even a 36 MP FF would be a good idea. The big question is still, what's in it for me?

I already have 2800 lw/ph when 2400 lw/ph seemed to be enough.
Going to 3600 lw/ph always sounds like a good idea, I just can't figure out why.
One could say, more cropping ability... but I use zooms for most shots, I crop really tight. Cropping is for prime shooters.
01-13-2015, 03:22 PM   #14
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QuoteOriginally posted by Winder Quote
We will have to see what sensor Ricoh goes with. The A7s plays well with most lenses, but the 36mp A7r has issues with quite a few FF lenses.
What issues?
01-14-2015, 01:07 PM   #15
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QuoteOriginally posted by Winder Quote
We will have to see what sensor Ricoh goes with. The A7s plays well with most lenses, but the 36mp A7r has issues with quite a few FF lenses.
And neither of those two have internal SR, like the A7II, so they don't play quite as well with old lenses.
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