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09-07-2009, 07:58 PM   #1
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Which version of the 45mm f/4 lens?

One of these days I would like to pick up a 45mm f/4 lens for my 6x7. Is there any reason to prefer either the older or newer version of this lens? I understand the optical prescription is the same. But are there any differences to note? Build quality? Propensity for "sample variation"?

Also, should I expect much of a price differential between the two?


Thanks,

Jeff

09-08-2009, 12:40 AM   #2
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Hi Jeff, I have owned both versions of the 45/4, actually two of the newer version, and currently the older version. As you noted, optically they are identical. I would say build quality is comparable, but I'm going by memory as I never compared them side by side.

My two copies of the newer version were duds. The older copy I currently have is much better. Pentax has had QC problems from time to time, and this has led to sample variation. This problem isn't unique to pentax. Unless I can get a used lens dirt cheap, I only buy from places with a generous return policy. KEH is great as you have 14 days to test, if you get a dud you can return it without hassle. I got my current 45/4 on ebay from Shutterblade for $240. They have a good return policy as well.

My problems finding a good copy seem to be the exception. There are a number of contributors to this forum who get excellent results with the 45/4, and they didn't have to go through three lenses!

Happy hunting,
Scott
09-08-2009, 01:07 PM   #3
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I have the Pentax 6x7 45mm ƒ4 and my friend has the SMC Pentax 67 45mm ƒ4. They are both made well and not much difference between them. Optically, they are unchanged in these two versions.

Here is a shot from that lens with a Pentax O2 filter:



320TXP developed in PMK Pyro, underdeveloped to compress the highlights.

Last edited by tuco; 09-13-2009 at 10:06 AM.
09-08-2009, 03:53 PM   #4
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Hi Jeff,

Ron Boggs will at some stage contribute to this thread as he loves his 45/4.

I took the gamble with respect to Scott and Ron's experience and picked up a 67 45/4 and can happily say it is optically perfect while being 90% cosmetically. It worked out to be about $300USD but I am happy to find that it is a good version.

Cheers Neil

09-08-2009, 08:29 PM   #5
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Original Poster
So that's good - it sounds like the two versions are pretty well equivalent, so it sounds like I may not have to concern myself with which version I get. Now if I can just avoid Scott's experience I should be in pretty good shape! That's a good point too about buying from some place with a reasonable return policy. But it reminds me that I should be ready to test the lens with a roll of film or two as soon as I get it.

Interesting shot tuco - you have me looking to see what an O2 filter is now.

Jeff
09-10-2009, 04:59 PM   #6
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Join Date: Feb 2009
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All 45's that I have seen have been the same optically and cosmetically, so why are we calling them different versions? Do we really want to call them different if there is a lettering difference (67, 6x7)? It may be bestter to distinguish them by serial #. My 45 is one of the good ones and is 85xxxxx serial # and was made in 1989-90.
09-10-2009, 08:04 PM   #7
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QuoteOriginally posted by desertscape Quote
All 45's that I have seen have been the same optically and cosmetically, so why are we calling them different versions?
They gave it a facelift in the 67 line. It has a different focus and aperture grip and no chrome ring on the end of the lens.

Last edited by tuco; 09-10-2009 at 08:14 PM.
09-11-2009, 10:05 AM   #8
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Here I am a couple days late--dead internet for a couple days...wire and cans leading into the woods failed.

I only have experience with the late model 45/4 and I flat love mine. No problems whatsoever. Really nice flare control for a wide angle, really nice distortion control, surprisingly sharp corners with minimal distortion. Fun lens!

The O2 is "orange #2" black and white filter. I think I may have a multicoated Pentax 82mm bayonet O2 for sale in the marketplace under the title "Filters Galore." I'll check for you...

09-11-2009, 10:28 AM   #9
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Here's the link to my filters that are for sale including the Orange filter tuco used. Note that there are several 82mm bayonet filters which work on the 45/4. All the 67mm bayonets sold to Riku in Finland, sorry...

https://www.pentaxforums.com/forums/photographers-marketplace/22633-fs-filter...iopan-etc.html
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