It's the X-sync switch, presumably needs a clean. The contacts are meant to be self-cleaning and it used to work. Yeah been a few years and still not touched it! I adjusted the meter so it's only the flash switch to fix, I brought it downstairs at Christmas and it's still sitting there! Got the 450mm Soligor for my wife to use at track days, it's manual aperture, max f8, pics aren't bad though. The 2x I got with some other stuff, don't think I've used it before. It's quite compact though so would be handy to turn a 50mm into 100mm rather than carrying a rather large 135mm around, it's about the size of a pancake lens. I used this for exposure:
http://xjubier.free.fr/en/site_pages...alculator.html
but I also used a tripod as at equivalent of 900mm any movement is quite noticeable, and f16 means a slower shutter time, although it's the Lomo ISO800 film. Reminded me of using a telescope, the field of view is so narrow you could do with a small finder scope attached to get the aim right! Also need to try out the Flektogon you got me.