8mm Forum: what is this?

This is topic what is this? in forum 8mm Forum at 8mm Forum.

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Posted by John Yapp (Member # 2873) on May 09, 2013, 03:59 PM:

Bought this lens on ebay without really knowing it's exact function. Doesn't fit any of my lenses, so unable to tell it's benefits. Can anyone enlighten me?

Posted by Maurice Leakey (Member # 916) on May 10, 2013, 04:23 AM:

Google says Sideral is "relating to the stars".

The ebay seller thinks it's a wide angle projection lens, however, such a lens would never be as long as this, so I suggest it could be an attachment for fitting to a camera to photograph far objects such as stars.

It's only a wild guess.

Posted by Alexander Lechner (Member # 1548) on May 10, 2013, 04:31 AM:

With only a quick look at the picture I read "SPECIAL" where it says "SPACIAL".
I think this confirms what Maurice is suggesting.

Posted by Pasquale DAlessio (Member # 2052) on May 10, 2013, 05:05 AM:

I concur!

Posted by Martin Jones (Member # 1163) on May 10, 2013, 06:03 AM:

Interesting!
The word "Spacial" immediately caught my attention... because I have two boxes of items containing items bearing this word.
They are "pseudo" 3-D sets, comprising 6 (one box has only 4) Polaroid spectacles and a lens attachment which produces 2 slightly displaced images of the same frame on the screen, polarized at right angles to each other.
This is supposed to provide 3-D movies from ordinary flat ones!!!
Needless to say, it doesn't... but the public would vbelieve anything in those days.

"Spacial" is presumably the name of the manufacturer.

( Price on the 18/1/1968 was 11 shillings and 9 pence (Inc shipping), which equate to GBP 0.59 !!!!!
Martin

Posted by John Yapp (Member # 2873) on May 13, 2013, 03:31 PM:

i just found out that it fits my agfa sonector if I take the mount off..and it turns this...

into this..

woohoo!

Posted by Pasquale DAlessio (Member # 2052) on May 13, 2013, 05:01 PM:

WooHoo! What a find!

Posted by Lee Mannering (Member # 728) on May 15, 2013, 12:14 PM:

Not really as it will greatly reduce the amount of light on screen. Had one of those in the 70’s and it quickly moved on. They came without projector lens and you had to either work out how to attach it to you existing lens or use a bracket.

Posted by Hugh Thompson Scott (Member # 2922) on May 15, 2013, 03:40 PM:

I had something similar, as discussed in a different thread,it only
was a single element affair, but was a useful item to have. It and I
parted company when a friend of mine,who only had a short throw
but wanted big pictures,his need was greater than mine.

Posted by John Yapp (Member # 2873) on May 15, 2013, 04:06 PM:

I have to say Lee, that it doesn't "Greatly" reduce the amount of light on the screen, although it lessens it a bit. I think this must be very similar to Hugh's as it is indeed just one lens element. I'm not complaining at £4 plus postage.

Posted by Hugh Thompson Scott (Member # 2922) on May 15, 2013, 06:20 PM:

Really there isn't any light loss as such John,it just spreads it over
a greater area. I agree that at such a small outlay you've got a
nice lens that could "save the day" at a screening event. Well done.

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