Stig B-M Posted October 21, 2017 Share #1  Posted October 21, 2017 Advertisement (gone after registration) I have just received a Telyt 6.8 400mm. I have one question.  What is the spring loaded ring on the rear part of the lens good for?  When pulled towards me, it opens for a cut half-way into the tube.  KR  Stig B-M Link to post Share on other sites More sharing options...
Advertisement Posted October 21, 2017 Posted October 21, 2017 Hi Stig B-M, Take a look here Telyt 6.8 400mm question. I'm sure you'll find what you were looking for!
jaapv Posted October 21, 2017 Share #2 Â Posted October 21, 2017 IIRC Series 7 filter Link to post Share on other sites More sharing options...
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