[marcusBMG]

which isn't fully functional with the PKA adaptor

All adaptall lenses, whether 1st gen, adaptall-2 or SP, are fully functional with the pka mount (why wouldn't one be?) .... with the exception of the 200-500mm f6.9!

PKA idiosyncracies (iffy connection, inconsistent exposure with changing f stop, some mounts don't go past f4 etc) are, IMO, due to the mount itself... probably.

+1 for the jupiters/tairs. Also the Carl Zeiss jena 135mm f3.5 must always be in the mix. I find the tamron 03B is a good sharp lens but prone to some fringing, in fact thats something of a commonality with the adaptalls, similarly the 200mm 04B.

[kypfer]

All adaptall lenses, whether 1st gen, adaptall-2 or SP, are fully functional with the pka mount (why wouldn't one be?) .... with the exception of the 200-500mm f6.9

Unfortunately my only first-hand experience with an Adaptall (not -2) lens is with my beloved 200-500mm f/6.9 and I made the mistaken assumption that any others of a similar vintage would only have a single slot for the coupling "ears" on the Adaptall-2 adaptors and consequently wouldn't work with open-aperture metering


My mistake!

[marcusBMG]

Yeah we had a bit of discussion on the adaptall lens club thread as to why the 200-500mm f6.9 had only one slot, without reaching any conclusion. I have the original (ie derived from adaptamatics) 1st gen 28mm 135mm, 200mm, 300mm, all have two slots and operate the same as all the other adaptalls. How do you like your 200-500mm btw (>> adaptall thread...)

[kypfer]

How do you like your 200-500mm btw

Sorry, I wasn't about to trawl through a 240-thread forum to find an appropriate place to reply ... I'll just say that whilst the image quality is quite adequate, especially given it's age, I always found having the focus control all the way down the front of the lens to be a bit of an inconvenient stretch, especially if shuffling between zoom control and focus to find a moving subject and frame before fine focussing

[mcgregni]

Here's my recent photo thread featuring the Tamron Adaptall 135mm F2.8 ......

One Lens Challenge, Tamron Adaptall 135mm - PentaxForums.com

I certainly didn't even have to think about any CA!

[marcusBMG]

Very nice images mcgregni. Forgive me being a little pedantic - that's definitely the ct135 from 1976 in the window reflection. The 1st gen from 1974 looks different from the front. I have the latter, the former is one of the few I haven't added to the collection yet.

[kernos]

Lovely shots mcgregni. This lens looks like a real keeper.

[Lowell Goudge]

Yes, I've seen in third-parts lenses ... but I still have many doubts ... I really like the Russians, but I fear about chromatic aberrations. As sharpness I think they are on the same level. In the past I had a pentax (Bayonet) 3.5 and I remember suffering from a strong purple fringe ...

I think you need to separate lateral CA (green / magenta fringing) radiating out from the centre of the image , and purple fringing, which is , if anything longitudinal CA,

I have not seen significant Purple fringing in any of my Pentax legacy lenses, (on an SLR , the Q is a little different ) although I do see some lateral CA

[Skodadriver]

This morning I bought another CZJ MC S 135mm f3.5. It has a couple of dust specs inside but works nicely.
I could not let it stay on the shelf priced at GBP £15 could I? OK maybe I could if the red mist had not descended on me.
A bargain!