Originally posted by aslyfox my ebay purchase arrived yesterday
as advertised it is a Tamron Adaptall-2 SP 500mm f/8 Mirror (55BB) with front and end caps and the appropriate hood. ( don't like the fact the hood when reversed over the lens does not lock into place ) and the carrying case. It is in good shape but has some deterioration of the outer lens coating on the extreme edges
I am admittedly a newbie ( who posts a lot ) so hints, guidance and suggestions are eagerly sought:
what settings should I use on my K 3 or K 3 II
best methods of bracing if I don't use a monopod or tripod
and any thing else you might want to add
this is my first mirror lens and my first adaptall lens
Its a fixed aperture, so I usually use the Av setting with an ISO about 1600 - depends on your camera model as to which ISO keeps you out of the whole-grain category of lost sharpness. My K70 gives acceptably sharp images up to 3200 ISO. Using the old film-era formula that "the focal length is the fastest hand-held shutter speed", then my ISO needs to give me a shutter speed faster than 1/500 sec. For high-resolution digital, I would suggest that at least doubling the focal length is appropriate, so hand-hold for shots faster than 1/1000sec unless you are really well braced.
My brace position is: left shoulder against a wall or car, left hand cradling the lens barrel from below, right hand holding the camera body with finger on the shutter. The left hand can then make minor focus tweaks as I hold my breath and press the shutter release.
Your indoor deer-eye shots are also testing the non-existent depth of field at close to the minimum focus distance. There is a very sensible reason why the lens does not have DoF marks when most other 1980s lenses made a big point about the DoF.
This is a lens which rewards perseverance over enthusiasm, and you really do need to learn the physics of the focal length to get the most enjoyment from some spectacular "long range close-ups").
Enjoy this lens, it is remarkably different form the others in your kit.