2020. 2. 29. 17:29ㆍ카테고리 없음
Your Solida III's S-K lens 4668746 is April 1956.You say it has no self-timer. Strange: I can see it in the photo! So, I presume you don't know that on the Synchro-Compur the little conical button on top of the lens is the self-timer. Cock the shutter, then pull back the button and push the cocking lever some more, about 5mm.
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This sets the self-timer.Frustratingly their seems to be no list of serial numbers for the Enna lenses. However -SVS shutter was introduced in 1954 - see advert here: (my website).The change to square viewfinder windows may also have been that year (confirmation required, although I'm sure I've seen one on ebay). Your Ennagon lens has writing on the outside, later models have it on an inside ring. So, let's say it dates to 1954-57, although that's no more than an educated aguess.To your correspondent asking about lens cleaning: with three element lenses like the Radionar, the rear element will unscrew but you need a lens spanner (try ebay - I got mine from India). Be sure to cover the glass with tape in case the spanner slips!
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Early cameras only need the focus limiter screw removed and the front element will unscrew. However, later cameras will need to have the bezel removed first. (Two screws beside the '22's' clearly seen here This lens has been serviced before it came to me and the lower screw is burred from being removed.). I haven't yet done that for myself so can't comment whether there's any problem, although I doubt it.I hope that's all of interest.Malcolm Grant Purvis.