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12-28-2011, 07:10 PM   #1
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Performance of 645 FA 120mm f4 macro lens at long focusing distances

Hello all,

I have read great things about this lens - but many of the rave reviews refer to its use at close focusing distances. My style tends to emphasise longer subject-camera distances, frequently infinity-focused (or close to it) landscape scenes. I have found a couple of comments suggesting that the lens is less than stellar when focused at longer distances. Does anyone have any evidence/data/experience about this?

I would use the lens on a 645D, so naturally even slight performance issues would be quite evident - I am aiming for something outstanding even when judged critically!

All help much appreciated.

Ed

12-28-2011, 08:09 PM   #2
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Are the "less than stellar" performance issues going to be evident in the finished prints you're planning to make? What size are you considering printing?
12-28-2011, 08:34 PM   #3
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The final print was 12 feet long and 44 inches high. This is from the A version which I understand is identical to the FA.
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Last edited by Yamanobori; 12-28-2011 at 08:43 PM.
12-28-2011, 08:41 PM   #4
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Personally, if someone thinks this lens is no good at infinity, they need a better pair of glasses.

12-28-2011, 09:05 PM   #5
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Original Poster
Thanks guys - I appreciate it! It seems the view here is that lens is very good at long focusing distances :-)
12-28-2011, 09:07 PM   #6
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Well, my view at least.
12-28-2011, 09:22 PM   #7
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I can't see how it wouldn't be good at focusing at long distances, and if you're dealing with 144" wide prints that are not suffering in the least, I also can't see that any sort of conventional print size would be lacking in acceptable quality, whatsoever.
12-28-2011, 09:32 PM   #8
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Oh, and also: cool print.

12-29-2011, 02:54 AM   #9
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I've been using my FA 120 for more long focussing than short, and I'm very happy with it. Still my sharpest lens alongside the FA75
12-29-2011, 12:35 PM   #10
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I don't own the 120 but have shot the 135 macro on the P67 quite a bit. It did well at infinity. Macro designs are indeed corrected for close work but can do well at infinity when stopped down a bit. I won't go into the esoteric reasons for this.
12-29-2011, 01:46 PM   #11
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Thanks all! I too have the 135mm f4 macro for the P67 and found it very good (both on the 67 and the 645D), including at infinity. But wanted to be sure that the same (or better) applies to the 645 120mm f4 macro. It seems that it does!
12-30-2011, 03:21 AM   #12
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you should try the 100mm Macro then - beautiful on the 67 and also great on the 645D. But: as expensive to get as the 120mm FA
01-03-2012, 12:51 PM   #13
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It is way to early for me to judge this lens. I ordered it a few weeks ago and it was scheduled to arrive in February, but today, I have gota phone call from my usual shop telling the lens is ready to be picked up. Well, winter is not really the ideal season for macro and being back at work, it is almost night when I come home, but I just managed to get enough time to unpack the lens, mount it onto the 645D, mount the whole thing on a sturdy tripod and try to take the last light of the day:

645D, FA645 120/4, f/8, 3s, 100iso, MLU, tripod


Too early to judge, but it looks definitely like a good performer to me...
01-03-2012, 01:07 PM   #14
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Héhé, personally i must say i was not impressed at all by the copy Pentax France held in the paris medium format fair last june... but i used it only in macro shots.

I bet this one (the second pict looks really like a 120 or 135mm) will be far better, and SDM, probably just a few month to wait :



01-03-2012, 02:17 PM   #15
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Well, given the extremely narrow depth of field at macro range, this lens does certainly require a sturdy tripod for this kind of work. I doubt a fair is the ideal place to take macro test shots with a medium format camera. At least for landscapes, it looks like a good performer, I hope I will be able to use it for macro within a few days or weeks...
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