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10-31-2013, 05:10 AM   #31
Pentaxian




Join Date: May 2010
Location: Sydney
Posts: 478
I am sure all of the recommended options are very good :-)

But I won't be replacing my 6x7 75mm f2.8 AL for a 645 75mm because, having tried both, the 6x7 lens wins hands down IMHO...

10-31-2013, 11:51 AM   #32
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Join Date: Mar 2012
Posts: 156
Experiences appear to vary. I did include the 400mm ED precisely because of its speed, but anyone has to admit it's a brute. I find both (67 ED and 645 ED) equally sharp at 5.6, the 645 version a tad better. The 645 400 may have some color fringing, but the 67 ED version only reaches optimum contrast at f11. While it can be enhanced in photoshop, you do loose microcontrast. Both are great lenses IMHO.

In the 75mm range one shoudn't compare apples and oranges. The 645 version is half the size, half the weight, and a quarter of the price of the 75mm AL. The 645 version is also a great macro lens when reverse mounted, in fact one of the best. Just used it a second ago. I confess I don't have the 67 75mm Al and can't attest to its quality, and I take your word for it. But as I said, the 645 version is among the best lenses in the line-up, compact, reasonably priced, has autofocus, and is a great macro lens in reverse position. And I guess 75mm isn't my preferred focal length in the first place, so the 645 version meets my bill.

I agree that the 90mm is much heavier than the adapted 105, and much more expensive. It is perhaps the one lens in the new line-up that I am least comfortable with. Having said that however, it has autofocus, image stabilization, and macro capabilities, and image quality and bokeh are superb, arguable better than the 105.

I'd be perfectly happy to add the 75mm AL and the 105mm to the list of 67 lenses that make (some) sense on the 645D, perhaps more for some than for others. On the other hand, I stay with my original statement that only about half of the 67 lenses do make sense, mostly those on my list. The longer non-ED telephoto lenses, the fisheye, some of the other wide-angles, and even the 165 and the 200mm are less convincing. In fact, if you like the touch of the 67 lenses, the old 645 A line also has some lenses with superb mechanical qualities, including the 35mm, the 120mm and the 200mm A.

There seems to be some sample variation among 645 and 67 lenses, and I guess I have been happy with most of mine. I seem to have great copies of both the 300 and the 400mm 645 ED lenses and a wonderful 150mm as well. The 120mm macros seems to be invariably exquisite. Don't seem to have a dog among any of them.
10-31-2013, 12:00 PM   #33
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Join Date: Mar 2012
Posts: 156
... one example when the 67 400mm excels, taken after sunset and hand held... at 4.0...
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10-31-2013, 12:20 PM   #34
Pentaxian




Join Date: Feb 2009
Location: Arizona
Posts: 889
I'm a bit surprised that the 400 Takumar for the 67 does not do well on the 645D. It is well corrected for CA (near zero longitudinal chromatic and slight lateral chromatic) and has better contrast than the 300 Takumar. It is way sharp on film, but I guess there is not a direct correlation between performance on film and performance on digital. The 600 Takumar has to be stopped to f/13 and beyond to reduce the longitudinal color, so it is understandable why that is not a contender.

11-14-2013, 02:38 PM   #35
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Join Date: Nov 2013
Posts: 40
Well, it wasn't until my second year of 645D ownership that I started looking into 67 lenses and adapters, after trying a Hartlblei tilt shift and an East German Zeiss with interesting results.

My favorites in the 67 series on the 645 follow in this order:

67 75mm f2.8 AL - excellent sharpness and rendering, IMO.
67 55 mm F4, late model- very sharp, prefer it to the DFA 55 mm, have both.
67 100mm macro- not easy to find, but if you can at a good price, it's worthwhile if you like manual focus operation, as these lenses have a great mechanism.
67 105mm F2.4 - useful as a portrait telephoto, nice rendering, very inexpensive relative to performance.
67 300mm F4 ED IF tele- excellent lens, but over priced compared with the 645 A 300mm ED IF unless you want the last word in edge sharpness
67 75mm f4.5 shift lens

I own a number of others bought as experiments (late model 165mm, 200mm, for example), but these are the ones I regularly use and like the results.
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