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06-28-2011, 08:50 PM   #31
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QuoteOriginally posted by haassaasin Quote
Started reading this thread and almost decided to buy it, then read that it has focusing issues which I wont be able to fix on my k-x :s

I guess its a good thing I do not want to buy it any more because I already have the 35 f/2.4
I think it would be wrong to assume that all copies of one particular lens have focusing issues. I think the reality is that some copies of this lens don't focus perfectly on some bodies.
AF calibration issues or not, don't forget that there's a such thing as manual focus
You might want to manually focus with such a fast lens anyway. Depth of field is pretty shallow with wider apertures at closer distances, I don't imagine an AF system would get it perfect every time anyway.

Nice examples in this thread. This lens has been on my radar for a while along with some other options. The obvious alternative being the FA31, but that requires some financial sacrifices

06-28-2011, 10:42 PM   #32
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QuoteOriginally posted by haassaasin Quote
Started reading this thread and almost decided to buy it, then read that it has focusing issues which I wont be able to fix on my k-x :s

I guess its a good thing I do not want to buy it any more because I already have the 35 f/2.4
Dont dis-regard it due to the fact that some copys do have bf/ff issues,(hence why you try before you buy), you will find that most fast lenses will probably need micro adjustment. Infact my 3 Pentax Limiteds needed more micro adjust than this sigma And if you find that your copy needs adjustment, Sigma will adjust it free of charge to match your body.
06-28-2011, 11:26 PM   #33
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'Tis a nice lens this one.

Wrote some similar things: https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/121684-thought...m-f-1-4-a.html
06-29-2011, 05:05 AM   #34
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QuoteOriginally posted by Digitalis Quote
As for the whole edge sharpness thing I wouldn't worry about it too much, the Sigma 30mm f/1.4 is a DX lens - the FA31 is a full frame lens and of course the FA31 is going to deliver better edge-to-edge performance on a DX sensor, it's imaging circle is practically twice the size. But the fact that the FA31 is able to be used on a full frame camera(and if performs very well on T-Max 100), has an aperture ring and superlative construction are some of the primary reasons why I was so interested in it, and the optical qualities are what convinced me to buy it.
Unfortunately, the lack of usefulness on film has made the Sigma less interesting to me than the FA31 as well. However, at half the price, one could afford to buy another lens for film.

06-29-2011, 07:33 AM   #35
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QuoteOriginally posted by GeneV Quote
Unfortunately, the lack of usefulness on film has made the Sigma less interesting to me than the FA31 as well. However, at half the price, one could afford to buy another lens for film.
Has anyone tried it on film? I'm curious; many "APS-C" lenses still cover the full 24x36mm; some with vignetting that's easily corrected in post. I mean, I don't shoot film anymore, but I'd be interested in the result.
06-29-2011, 09:34 AM   #36
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Would be interested too.

The DA 35 2.4 also works, if the sigma does not.
06-29-2011, 11:22 AM   #37
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QuoteOriginally posted by jstevewhite Quote
Has anyone tried it on film? I'm curious; many "APS-C" lenses still cover the full 24x36mm; some with vignetting that's easily corrected in post. I mean, I don't shoot film anymore, but I'd be interested in the result.
It has no aperture ring, so that eliminates my favorite film bodies (LX, MX), right there. However, it would be interesting to mount it on the Superprogram or ZX-L and see what happens. I wouldn't want to pay for it first, since the tests showed pretty marginal border and corner resolution even on APS-C, so my expectations are not high.
06-29-2011, 11:24 AM   #38
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QuoteOriginally posted by paperbag846 Quote
Would be interested too.

The DA 35 2.4 also works, if the sigma does not.
I have the FA35/2 for that.

06-29-2011, 11:35 AM   #39
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QuoteOriginally posted by GeneV Quote
I have the FA35/2 for that.
Me, too. Now I need a Pentax film body
06-29-2011, 11:37 AM   #40
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QuoteOriginally posted by jstevewhite Quote
Me, too. Now I need a Pentax film body
They are not hard to find. The FA has an aperture ring and works with everything.
06-29-2011, 12:00 PM   #41
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QuoteOriginally posted by GeneV Quote
They are not hard to find. The FA has an aperture ring and works with everything.
See, I went looking, and I keep getting sidetracked by the cheap 645s and 6x7s I always loved that 645.
06-29-2011, 01:19 PM   #42
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Where IS that UPS guy? I swear he knows I'm waiting for a lens and moved us to the bottom of his list; we're usually 11:00 am!
06-29-2011, 02:37 PM   #43
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QuoteOriginally posted by jstevewhite Quote
Where IS that UPS guy? I swear he knows I'm waiting for a lens and moved us to the bottom of his list; we're usually 11:00 am!
Ha, ha! Isn't that the way it goes...

Let us know what you think when you get it! When I had that lens, I enjoyed it.
06-29-2011, 02:38 PM   #44
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TOUGEFC: Did you sharpen any of those images in post? I just don't recall my copy of this lens being that sharp wide open.
06-29-2011, 10:51 PM   #45
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Hrm. Got mine today. K-5 identifies it as another different lens I have and applies the fine focus adjust to it.

I zero out the fine focus. Shoot pix of cat. Cat is out of focus, but floor is in, so I dial in focus. Get it right. Shoot some more tests outside. back focus again. Dial it up to +10; still back focuses just a tad. I walk around shooting off-the-cuff test shots, look 'em over. Erratic focus.

Turns out that I have to stop down to f2 to get accurate focus. At 1.4, it front focuses sometimes, back focuses others. *sigh*. Trying to decide whether I want to mess with it or not - it works very well with live view focus, of course. I certainly don't want to send the camera and lens off to get 'em calibrated. I've got thirty days to return it to Amazon.
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