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06-14-2012, 02:36 PM   #1
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25mm...overpriced or worth the $$?

The 645D is terribly low on digital lens choices. Then Pentax comes out with a nice wide lens but it is $5K. Have the owners of the 25mm found it to be worth the $$ or do you fee it is overpriced?

Thanks

06-14-2012, 02:51 PM   #2
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I don't think that the lens choices out there for the 645D are lacking, with the exception of the extremely wide angle zooms. Take a look at other medium format choices out there and the lenses they have to offer. Sure, compared to 35mm systems there are fewer choices, but you're not going to get the IQ of the 645D with any of those. I'm very happy with all of the lenses I have for the 645D and I purchased all of them used for good prices.

I just purchased the 25mm D FA (older non US version) and haven't used it much..yet...but I will. I still need to devise a 4x6 filter holder for it. If you shoot a lot of wide angle stuff like I do and determine it will pay for itself then, yes, it's worth it. If you're an amateur and the images you take with the 645D + 25mm won't pay for themselves, then don't get it, unless $$$ isn't much of an issue.

The resolution is great on the 25mm, and distortion isn't too bad for the wide angle. It's a heavy lens, feels a lot like the 80-160 in your hands, and is even a bit more bulky. The CA's on my version are substantial and need to be corrected in PS and/or ACR.

My main issue with the lens is the lack of a filter holder for it, and the difficulty in creating your own, IMO.
06-14-2012, 03:00 PM   #3
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Thanks Ryan.

CA's and no filter options? Wow and $5000!!

I'm not a pro. Just use a lot of WA's. How does the 25 compare to Pentax film WA's for the 645? Are they any better / worse with CA and sharpness?
06-14-2012, 03:23 PM   #4
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QuoteOriginally posted by slackercruster Quote
CA's and no filter options? Wow and $5000!!
There is an internal filter compartment and the lens comes with a "normal" and circular polarizing filter. I think you can also buy a 40.5 ND filter for the internal as well..but haven't gotten around to that either.

What does WA stand for?

06-14-2012, 03:36 PM   #5
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Wide Angle
06-14-2012, 04:01 PM   #6
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Ahhh, Wide Angle.

Well, the 645 35mm A is a very sharp lens, I LOVE using it, very easy to focus and equals about a 28mm lens on 35mm Full Frame. I would say that the 25mm is a bit sharper (should be, as it was designed for digital), but the 35mm has almost no CA's. I've not yet had to remove any. I don't have much to compare with, but I'd say the 25mm's CA's are a little worse than those on my Canon 16-35mm f/2.8L USM II lens on the 5D mark II. They are a little worse than the Canon 24-105mm f/4L as well. I've never shot 645 film, so no comparison there.

The 45-85mm FA has slightly fewer CA's than either of the two Canon lenses I shot with, but they are noticeable in backlit situations and do warrant correction in post, though they are pretty easy to fix.

The 25mm is weather sealed, so that's a nice aspect that doesn't come with the older 645 lenses, though I've shot with them in light rain without issue in the past.
06-14-2012, 04:13 PM   #7
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QuoteOriginally posted by Ryan Tischer Quote
Well, the 645 35mm A is a very sharp lens, I LOVE using it, very easy to focus and equals about a 28mm lens on 35mm Full Frame. I
28mm on 35mm FF? I would say 24mm or less (it is not entirely comparable, because of the 4:3 ratio rather than 3:2), but then it dawns on me: you compare it on the 645D. My reference is the 645N. But I do agree that it is a great lens to have. And on the 645D I'd probably use it even more.
06-14-2012, 08:02 PM   #8
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QuoteOriginally posted by Smolk Quote
But I do agree that it is a great lens to have. And on the 645D I'd probably use it even more.
I've wished several times that the 35 A was a bit wider and if it were the equivalent of 24mm on 35mm FF, then maybe would have put off the 25mm purchase for a while.

06-14-2012, 10:34 PM   #9
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QuoteOriginally posted by Ryan Tischer Quote
There is an internal filter compartment and the lens comes with a "normal" and circular polarizing filter. I think you can also buy a 40.5 ND filter for the internal as well..but haven't gotten around to that either.

What does WA stand for?
Actually, you can find several 40.5mm ND filters from ND8 to ND1000, as well as IR filters.
Polarising and normal UV are given with the lens, so i dont see why you would need another filter structure ?
06-15-2012, 06:12 AM   #10
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QuoteOriginally posted by Zygonyx Quote
Actually, you can find several 40.5mm ND filters from ND8 to ND1000, as well as IR filters.
Polarising and normal UV are given with the lens, so i dont see why you would need another filter structure ?
For graduated ND filters a filter holder is absolutely necessary, which is necessary for many landscape scenes that include the sky. Of course, you can exposure bracket, but if you're also focus bracketing that is one more thing to potentially go wrong...
06-18-2012, 10:34 AM   #11
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so, is the 25mm overpriced ,and is it a good lens?
06-18-2012, 11:43 AM   #12
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QuoteOriginally posted by bull drinkwater Quote
so, is the 25mm overpriced ,and is it a good lens?

Hark Lee had a good rundown on it here. Don't have the link, but look for it.

Last edited by slackercruster; 06-18-2012 at 11:50 AM.
06-18-2012, 11:47 AM   #13
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Overpriced is a matter of opinion. Personally, I wish the D FA version were either a little better on the CA's and had the option of an easily attachable filter system for the front of the lens (or one I could buy). But hey, I still bought it, so obviously not too overpriced in my case.
06-21-2012, 11:15 AM   #14
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Availability appears to be an issue as well. My DA is on pre-order for almost half a year already.
06-22-2012, 02:44 AM   #15
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I have the newer version of this lens that I purchased a couple weeks ago. Currently testing it on a trip to Japan and besides a few things that annoy me about it, I must say it's very useful in this part of the world where everything is narrow. I started to write a short review of it I will be putting up soon.
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