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10-20-2017, 08:49 AM - 1 Like   #3481
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Watch out for when buying adaptall-2 zooms

One of the more common issues I have encountered with adaptalls, specifically the zooms, is loose mechanics. This is due to worn guides. The guides are plastic sleeved bolts that ride in cam slots. With use these wear, and the result is:

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10-20-2017, 10:09 AM - 1 Like   #3482
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Are you trying to say that the "SP" actually stands for "spasmodic"?



QuoteOriginally posted by marcusBMG Quote
One of the more common issues I have encountered with adaptalls, specifically the zooms, is loose mechanics. This is due to worn guides. The guides are plastic sleeved bolts that ride in cam slots. With use these wear, and the result is:
10-20-2017, 02:46 PM   #3483
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It's just an animated gif...
10-23-2017, 11:11 AM   #3484
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View through the brush...Adaptall-2 02B:


10-23-2017, 11:22 AM - 1 Like   #3485
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Well, I've added another Adaptall-2 prime to my lens collection. For a very low bid on an as-is Pentax ES body, I got the 54B f/5.6 300mm in the bargain. The seller didn't offer much in the way of condition description, but I figured the m42 Adaptall-2 adapter alone was worth most of what I was paying, even if the camera and lens weren't in usable condition.

The lens cleaned up well, but does seem to have a couple of small fungus spots on the inner surface of the rear element. Front glass was good. Internal dust was in the normal range.

Despite it being rather cloudy, I tried it out this morning, by putting a PK adapter on it and mounting it on my K10D. I bumped the iso up to 800, and still had to take a lot of the shots at very marginal speeds for hand holding, even shooting the the lens wide open.

Being able to take close-ups from long distance is an interesting capability, though most of these low-light shots would have benefited from a bit more depth of field. While it was cloudy, shots including sky had a bit of flare or in a few cases some purple fringing.

Here are three I liked from the first tests. The first and last are cross posted.





10-23-2017, 11:48 AM - 1 Like   #3486
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Good score, nowt wrong with that.
11-20-2017, 10:14 PM - 3 Likes   #3487
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I have owned the 70-150/3.5 (20A) since Fall of 1982 and it continues to surprise me. It was a seriously bright November day at Shore Acres in Oregon this last Friday. The late Autumn sun was fairly low in the sky despite it being almost midday and I was expecting a lot of flare. Happily, the BBAR coatings did their job and I got some unexpectedly crisp surf photos.

It Boils


Pentax K-3, Tamron 70-150/3.5 (20A)


Steve

(cross-posted on the Monochrome Landscape thread)

Last edited by stevebrot; 11-21-2017 at 02:48 PM.
11-21-2017, 01:39 AM   #3488
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I just got a 40A (35-135mm). I purchased it from an ebay dealer not specializing or especially knowledgeable about camera equipment, but what I could see in their pictures looked good. I was keeping my fingers crossed that it wouldn't arrive full of fungus and haze...and it didn't. There might be a bit more than average internal dust particles, but I don't see anything terribly concerning that could seriously degrade image quality. A few indoor tests with flash looked very good. I hope to be posting some daylight tests some hours from now!

11-21-2017, 05:34 PM   #3489
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It didn't turn out to be the kind of sunny day that had been earlier forecast...until late in the afternoon when the sun was dropping rather quickly, putting some potential subjects into shadow and putting the sun behind some others.

Here are a few samples from this new-to-me 40A, all OOC JPEGs shot at ISO 100 with the K10D's "natural" color profile and with Saturation, Sharpness, and Contrast settings centered. The first, shot from very close distance with the K10D's onboard flash was shot at f22, and the others were shot with the lens wide open.

Film box sitting on Tamron lens box:


Shingle oak saplings in the pasture:


Glowing treetops lit with late sunshine. The bases of these trees were in shadow. If this looks a little soft in places, the leaves were being tossed by gusts:


The west ends of two goats traveling east:


I'll post some other exposures from this first outing with the lens, but others may need some exposure tweaking first.
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