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02-13-2012, 10:01 PM   #1
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500mm f5.6

Why is there a lack of information on the 6X7 500mm f5.6?

02-14-2012, 02:11 AM   #2
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Just did a search for it (love the new search!) and found this:
SMC Pentax 67 / SMC Pentax-6x7 / SMC Takumar 6x7 500mm F5.6 Reviews - 67 Telephoto Primes - Pentax Lens Reviews & Lens Database

Doesn't seem like a terribly popular beast!

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02-14-2012, 07:34 AM   #3
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Based on my experience with other lenses of this vintage, you should expect a lot of purple fringe and lateral CA, but I could be wrong *shrug*
02-14-2012, 02:30 PM   #4
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I'm just surprised that there isn't one review or anything. I would anticipate and expect the abberations/fringing, I have had other lenses of the same era and you just have to figure out where their weaknesses and strengths are.

Anybody that has used one is free to chime in

02-14-2012, 06:08 PM   #5
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QuoteOriginally posted by Clinton Quote
Based on my experience with other lenses of this vintage, you should expect a lot of purple fringe and lateral CA, but I could be wrong *shrug*
If you shoot film it's not really an issue. Especially b&w!

Phil.
02-14-2012, 07:54 PM   #6
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I don't believe there was ever an SMC Takumar version of this lens as the database suggests.
02-14-2012, 08:35 PM   #7
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There is one here in Hong Kong, mint condition.
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02-15-2012, 02:51 PM   #8
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I've never liked the looks of the 500's cross section. It uses only 4 elements, with what looks like an APO triplet up front and a rear element that looks like a field flattener. There's a huge difference in color correction between the 400 and 600 Takumars so I am not sure where that puts the 500. My guess is that it will have problems with correcting colors passing through the marginal area of the lens.

02-16-2012, 07:00 PM   #9
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The 400mm f/4 ED [IF] is optically a superior lens, not to mention being one stop faster and it holds up to being used with a 1.4 rear converter better than even the 300mm f/4 ED [IF] - which is an extremely good lens by medium format standards.
03-12-2012, 07:01 AM   #10
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I have the 500 and have used it with a 67, 645 film cameras and with a 645D. It's a good lens. It's big and heavy and it's very difficult to prevent blur from shake at anything but the highest shutter speeds, even with the 645 and 645D. Since I use a 645D now and have the 645 400mm FA which is light, sharp and auto focus, I rarely need the 500 anymore. Here are some actual pixel crops taken with the 67 300mm ED and the 500mm on a 645D. The camera subject distance was changed so that the image size remained the same. Note absence of CA in the 300 and the 500 isn't all that bad for a four element lens.

03-12-2012, 08:35 PM   #11
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Obviously a different distance, but you can really tell how much better the FA 400 is.
03-13-2012, 12:53 PM   #12
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QuoteOriginally posted by Clinton Quote
Obviously a different distance, but you can really tell how much better the FA 400 is.
Yes the 300 ED is in a class by itself, but the 500 is a good lens. Keep in mind I did no PP other than levels and you're looking at an actual pixel crop at 72 ppi - this would be a print 8x6 ft!
05-04-2012, 03:13 AM   #13
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Some links, which could be of interest in this context:
Pentax 67 Lens Guide
67: 300, 400, 600
67: 800
05-04-2012, 06:42 AM   #14
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Note that the 4 element lenses also exhibit very low contrast relative to other lenses. Kind of hard to see in the samples but it's noticeable. Really bad on some subjects especially shooting vegetation or darker areas. I still have the solution for sale in the marketplace you know...:evil:
05-07-2012, 08:45 PM   #15
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QuoteOriginally posted by Ron Boggs Quote
I still have the solution for sale in the marketplace you know...
I thought for sure it would have been picked up by now, it doesn't deserved to be the last one picked at recess. But, alas, I had to direct my funds toward rvannata's A* 600mm posted in the marketplace. I felt like I needed the reach.
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