I've been wandering around the local yard sales and flea markets with the wife on weekends. Keeping my eyes open for a random reflector telescope that will probably never materialize. I have been running into LOTS of old cameras. What I've discovered is that my T-adapter that I use to connect my DSLR to my telescope doubles as an adapter that I can use for a lot of these lenses from the 70s and 80s. Sunday, I bought a Sigma f/3.5-4.5 28-70mm Macro Zoom lens for $10 and the guy threw in a Super Multi-Coated (SMC) Takumar f/2 55mm (Asahi Optical Co.). I found out that the Takumar is likely radioactive and contains thorium.
Anyways, the T-adapter I have doesn't get the lenses deep enough into the camera to achieve infinity focus. They still work fine for close up if the lens is very close. I ordered a small adapter that will hopefully to the trick. Here's the Takumar (photo). I've mostly been using the Sigma which seems more versatile. Taken some photos of flowers and insects which I'll post to get this forum going again.
Anyways, the T-adapter I have doesn't get the lenses deep enough into the camera to achieve infinity focus. They still work fine for close up if the lens is very close. I ordered a small adapter that will hopefully to the trick. Here's the Takumar (photo). I've mostly been using the Sigma which seems more versatile. Taken some photos of flowers and insects which I'll post to get this forum going again.
Attached Image:
~ Charlie Stevenson
8" f/5.7 String Telescope - 1st Scope Build; 2nd Place Stellafane 2016 Optical Award for Newtonians 12.5" and Smaller
10" f/4.5 Newtonian (June 2015) mirror refigured by Optic Wave Labs P-V WaveFront 1/14.24, Strehl Ratio 0.993 (Aug '15)
Criterion RV-6 seems to be circa 1973 (June 2015) [For Sale]
Celestron C8-A XLT (January 2015) [For Sale]
Celestron PowerSeeker 70AZ (Christmas 2014)
Aldrich Astronomical Society member since 2015
http://astro.charleskelleystevenson.com/