[mikdyb]

I inherited a bunch of old lenses from my father a couple of years ago. I have sold some of them and would like some advice on the rest. I mostly shoot plants, birds and insects (macro and long tele) and landscapes. My current camera is a K-3 used with Pentax 55-300mm wr, Tamron 17-50mm, Tamron 90mm macro and Sigma 150-500mm. I also own a K100D wich is permanetly equipped with an M42 adapter and one of the old lenses, the Tokina rmc 28-85mm for playing with Brenizer-style photos. I furthermore own a Q-S1 with K-mount adapter for extreme telephoto.The old lenses are

Mamiya/Sekor 55mm auto sx 1:1.8 M42. Review (not sx)
Mamiya/Sekor 85mm auto sx 1:2.8 M42. No review
Tamron adaptall 2 20A bbar mc cf tele macro 70-150mm 1:3.5. Review
Tamron adaptall 2 bbar multic. 35-80mm 1:2.8-3.5. Review
Vivitar auto telephoto 400mm 1:5.6 no.28400346 M42. Review
Tokina rmc 80-200 1:4 M42. Review
Tokina rmc 28-85mm 1:4 M42. No review

I have used the Vivitar 400mm and I am not impressed. I am selling it.
Specific question about the Tamron adaptall 35-80mm: The cap, and cap only, so might be wrong cap, says Tamron adaptall 2 for Pentax K. It is some kind of bayonet but I can not mount it on the K-3. Could I be doing something wrong?EDIT: Answered. See post below from LensBeginner.
Considering my photographing priorities, which would you keep and wich would you sell?
And selling, would pricing around average price taken from the reviews be a good idea?

I am perfectly aware, that the proper way to decide would be for me to use all lenses for some time and making up my own mind, but I would like help to narrow the field down a bit.

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Last edited by mikdyb; 12-20-2015 at 05:44 AM. Reason: Information recieved from LensBeginner

[LensBeginner]

Adaptall lenses were designed to "adapt" to all cameras via adapters (ha, ha!)
Check if you have a ring of sorts mounted on one of your lenses*, or somewhere else in the bag/box.
Google "adaptall ring" to see donne pictures of what you're looking for.
Also be aware that adapters come in different flavors, and you might lose some function by using a cheaper one. Some other forum member might be able to elaborate on that better than I can :-)

*maybe it's on the 70-150mm, if you can actually mount that with no issues?

[mikdyb]

Thank you, LensBeginner! The word adapt-all should have rung a bell. My only excuse is that I am danish :-). I had a look, and both adaptall lenses are mounted on an adapter. One on an M42- and the other on an unknown bayonet-adapter (probably Miranda, but I sold my Miranda bodies so I can not check). I will edit my post accordingly.

[mikdyb]

Thank you, dcshooter. I will try them both. Maybe they might be better choices for my "Brenizer K100D" than Tokina 28-85mm though for that purpose, the Tokina@60-80mm seems fine.

[ramseybuckeye]

The Mamiya Sekor SX lenses cannot be used on a dslr without mods, they may damage the camera. I don't remember exactly what they need but a little research will turn it up. You can however use it with a Spotmatic. I would suspect that the 85 is the gem of the bunch.

[mikdyb]

Thank you, Tom. Warning duly noted.

[mikdyb]

I have modified the two Mamiya/Sekor lenses by removing the pin that communicates aperture status and locking down the auto diaphragm pin (link for procedure here). The 55mm mounts and works perfectly even at infinity. The 85mm needs to have the rim of the aperture ring filed down to mount and work properly; I will get to it eventually.

Have played a little bit with the 55mm and I am getting an idea of its potential. It may very well be the best glass I have ever owned!

So, thank you again, dcshooter and Tom, for drawing my attention to my Mamiya/Sekors. I think they will be keepers.

[mikdyb]

And a couple of photos with Mamiya/Sekor 55mm on K100D. I know that they are not fantastic (boring, grey weather and lack of experience with this lens) but I just had to post something taken with the modifyed lens.

[osv]

i did some landscape comparisons on the a7r between a 55/1.8 super tak and a 55/1.8 auto mamiya, and i sold the tak, it just didn't measure up, neither wide open nor stopped down... not the result i expected.

i would keep the mamiyas for further research, and dump the rest... if you want adaptalls, get the adaptall-2 sp models, some of those lenses rock on 36mp.

[mikdyb]

Thank you, osv. I think I have reached a conclusion. I am keeping

Mamiya/Sekor 55mm auto sx 1:1.8 M42
Mamiya/Sekor 85mm auto sx 1:2.8 M42

Tokina rmc 28-85mm 1:4 M42 (gotten used to it and find the quality quite decent)

and, if possible, selling

Tamron adaptall 2 20A bbar mc cf tele macro 70-150mm 1:3.5 on M42 adapter
Tamron adaptall 2 bbar multic. 35-80mm 1:2.8-3.5 on unknown bayonet adapter
Vivitar auto telephoto 400mm 1:5.6 no.28400346 M42
Tokina rmc 80-200 1:4 M42

now what would be a fair price for these four lenses? It is not really about the money, but I would like them to find a nice home.

[mikdyb]

Thank you, dcshooter. Will use your prices as a guideline. I have tried selling the Vivitar 400mm on a danish web-marketplace for over a year. Startet out at aprox. 110 $, now at 60 $ and still no takers. Maybe I should try the PF marketplace.

[mikdyb]

Mamiya/Sekor 85mm, aperture ring rim filed down. Success, infinity focus achieved. Aperture ring, though, is so tight that it is very difficult to use even now, when ring is not touching camera.

[mikdyb]

I managed to sell

Adaptall 70-150mm
Adaptall 35-80mm
Vivitar 400mm

for aprox. 100$. Not a lot, but the buyer was very happy and I am sure they will get a good home.