There never was a 1.4x teleconverter for M42. Plenty of 2x, but they were not the best quality. I do use a lot of M42 lenses with my Fuji X series mirrorless camera. One way to use M42 lens and have a 1.4x teleconverter is to use the Fujifilm XF 1.4x TC WR. Mount it on camera, then use a M42 to Fuji X adapter, then mount the lens on the adapter. It is designed for a handful of Fuji XF zooms. It'll all be manual focus, of course, but it works.

#fuji #fujifilm #fujix #photographer #photography

You'd think that adding an adapter and a teleconverter to a vintage M42 ("universal thread mount", as found on #Pentax, #Yashica, #Fujica etc) would make for a combo that is too heavy and too long for normal use. It really depends on the lens you combine it with.

Here it is combined with a #Spiratone #reflex #Mirror #Lens, 300mm f5.6. The whole thing is smaller than my #Fujifilm 50-230, and about the same weight but almost twice the reach.

#photographer #photography #camera #m42

@f_dion Most of 50mm and some of 135mm lenses for m42 are relatively compact. Comparing to Fujinon 56mm or 90mm they will be smaller.
@oku_yama_old i have this compact lovely Enna Werk, 35mm m42, made in Munich in the 1950s. The second retrofocus lens ever made after the famous Angenieux. Combined with an M42 speed booster, it is a very useful lens on apsc cameras.