Sinar Lens Board Dimensions Please?

gbenaim · Aug 23, 2005

Hi, All

I took up Alan's generous offer to make some lb's, and wanted someone who owns a sinar to please measure a board for me, including thickness, and shutter hole diameters for copal 0 and 3. I haven't gotten my camera yet. Thanks a bunch,

GB

David H. Bebbington · Aug 23, 2005

Sinar boards are quite complex. They are 139 mm square, outer rim is 4 mm thick (front to back) and 2 mm wide, recess is then 1 mm down from that, center area is 5 mm thick, recess is 3.5 mm wide. #1 hole is 35 mm, #3 is 60 mm. If at all possible, borrow a board and measure it with a micrometer - I've only got a ruler!

David H. Bebbington · Aug 23, 2005

Just an afterthought - I have encountered a nice Swiss man called Peter Nowak:
nowak@intercortex.com
who makes Sinar-pattern lens boards and will cut custom-sized holes and finish the boards in a durable black crackle paint. Making Sinar boards really does need the right machine tools!

MenacingTourist · Aug 23, 2005

Sounds like the Sinar boards are best made in materials other than wood. Wood working tools and materials have very different tolerances than metal working tools and materials. What do you Sinar users think?

I'm not trying to back out on a challenge but would rather have the user matched with the most appropriate solution.

Alan.

Mike Lopez · Aug 23, 2005

I have a Sinar lens board I'd be happy to give any of you. It came with a lens I bought about a year ago on eBay. I have no use for it.

Troy Ammons · Aug 23, 2005

MenacingTourist said:
Sounds like the Sinar boards are best made in materials other than wood. Wood working tools and materials have very different tolerances than metal working tools and materials. What do you Sinar users think?

I'm not trying to back out on a challenge but would rather have the user matched with the most appropriate solution.

Alan.

Wood wont work, as they are very thin. They have a groove around the outside too. Really to make one properly you would have to machine the groove on a milling machine.

David H. Bebbington · Aug 24, 2005

Sinar boards are usually die-cast aluminum alloy. The Nowak board of which I showed a picture actually has more elaborate lighting-trapping than some original Sinar Norma boards I have (which have only the outer flange), however the original pattern would be even more labor-intensive to mill from solid metal. I agree with Troy that even very hard wood would probably be too weak at the thicknesses involved (and definitely difficult to work with). Mr. Nowak charges 30 Euros for a new fully finished board with a standard hole and another 30 Euros to cut non-standard holes - producing boards yourself may well not be cost-effective.

gbenaim · Aug 24, 2005

Sinar board

Mike Lopez said:
I have a Sinar lens board I'd be happy to give any of you. It came with a lens I bought about a year ago on eBay. I have no use for it.

Hi, Mike

I'll gladly take your sinar board, if you really don't need it. I'm in Israel, but can paypal you the postage if that's ok with you. Let me know and I'll send you my address. BTW, what size shutter is it?

GB

JohnArs · Aug 24, 2005

Hi David

I have also 7 Novak boards and the light traping is much less then on an original Sinar Board and the fitting is not so perfect like the originals but I can live with them, but still prefer the originals because they have no play like mine from Novak have. Because the Sinars have at the corners also an perfect fitting inner corner part which the Novaks not have.
So you always pay for the Quality.

Daniel Grenier · Aug 24, 2005

Mike Lopez said:
I have a Sinar lens board I'd be happy to give any of you. It came with a lens I bought about a year ago on eBay. I have no use for it.

I'll take that board off your hands, Mike, as I am looking for one for my new camera. Let me know if it;s still available.

Cheers

David H. Bebbington · Aug 24, 2005

JohnArs said:
Hi David

I have also 7 Novak boards and the light traping is much less then on an original Sinar Board and the fitting is not so perfect like the originals but I can live with them, but still prefer the originals because they have no play like mine from Novak have. Because the Sinars have at the corners also an perfect fitting inner corner part which the Novaks not have.
So you always pay for the Quality.

Actually, on checking my 4 Nowak boards, I find three are an excellent fit and one is a LITTLE undersize, so maybe he does have a bad day every now and again. My Nowak boards have a center block a few millimeters high which fits into the camera throat - the two original Norma boards I have (olive green finish) do not have this, they are totally flat apart from an outside flange. I think Nowak is worth using, particularly for custom-sized holes, since without machine tools cutting a hole with a handsaw and finishing it with a file is more hard work than I'm looking for!

Regards,

David

Mike Lopez · Aug 24, 2005

Everybody,

Jim McDonough was the first to contact me regarding my Sinar board, so it will go to him. Thanks for your interest. I only wish I had more to give away!

Mike

Sinar Lens Board Dimensions Please?

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