View Full Version : “Top hat” lens board for Crown Graphic?
pchaplo
27-Apr-2018, 20:41
Found.
Dan Fromm
28-Apr-2018, 10:30
No. Which is not to say that one couldn't be made, just that you can't buy a used original issue one.
Edit: I just saw your WTB listing. A 150 mm general purpose lens doesn't need an additional 80 mm of extension on any size of Crown Graphic. I don't know whether to laugh or cry.
pchaplo
28-Apr-2018, 22:50
Just having some fun with a different application. Just For the joy of making and being playful.
Dan Fromm
29-Apr-2018, 07:41
Oh, dear, are you still riding that hobby horse? Make a rigid cover for the bellows.
Daniel Unkefer
29-Apr-2018, 10:14
Here's a suggestion that works for me. Recessed enlarger boards are available cheap on Ebay. Flip it around and you have a "top hat".
I use brass hobby model screws to hold it all together.
https://farm3.staticflickr.com/2626/13174174993_eb5c9787fd_c.jpg (https://flic.kr/p/m5a6fa)001 (https://flic.kr/p/m5a6fa) by Nokton48 (https://www.flickr.com/photos/18134483@N04/), on Flickr
Durst IXOTUB recessed board on the right, unmarked recessed enlarger board on the left.
Daniel, thanks — that’s a creative solution and fits my shoestring budget :)
I could easily also make a Copal 0 end plate that is removable, for easy mounting!
I've made top-hat lensboards out of thin plywood, you just had to make a extension box and attach it to the lensboard somehow, it's not terribly difficult.
Daniel Unkefer
5-May-2018, 06:02
https://farm8.staticflickr.com/7545/27565427293_866303ce8b_b.jpg (https://flic.kr/p/HZS2aP)2016-07-08 06.11.52 (https://flic.kr/p/HZS2aP) by Nokton48 (https://www.flickr.com/photos/18134483@N04/), on Flickr
Another possibility for you, are these anodized screw-together metal tubes (made in China). $20 each they are advertised on Ebay as for "Wista", but I modify mine to fit Plaubel Peco Jr. Nicely made and not too expensive, either. Come in three different lengths, your choice. I have quite a few of these, I keep reordering them as I need them. I lined this tube set with flocking paper from Edmund Scientific.
Shown ^^: 360mm F11 Kern-Arau dialyte on Plaubel Peco Jr board (No; It's not heavy at all. A lightweight set).
You can also see how I trimmed down the original Wista board (also $20) with my power scroll saw and attached that to the Plaubel board, again using teeny tiny modeling brass screws from the local hobby shop.
Domaz, that fits my budget and I have a wood shop. Another creative idea! Thanks!
I've made top-hat lensboards out of thin plywood, you just had to make a extension box and attach it to the lensboard somehow, it's not terribly difficult.
Daniel, nice craftsmanship and very inventive! Yes! That is what I was thinking: to trim down some other board and attach the salvage remnant to a Crowb board. Did you tap and thread the holes, or drill a pilot and let the screw grip? Or small small screws/bolts with nuts? Knowing exactly what screws yu use would be a great help. Thanks!
https://farm8.staticflickr.com/7545/27565427293_866303ce8b_b.jpg (https://flic.kr/p/HZS2aP)2016-07-08 06.11.52 (https://flic.kr/p/HZS2aP) by Nokton48 (https://www.flickr.com/photos/18134483@N04/), on Flickr
Another possibility for you, are these anodized screw-together metal tubes (made in China). $20 each they are advertised on Ebay as for "Wista", but I modify mine to fit Plaubel Peco Jr. Nicely made and not too expensive, either. Come in three different lengths, your choice. I have quite a few of these, I keep reordering them as I need them. I lined this tube set with flocking paper from Edmund Scientific.
Shown ^^: 360mm F11 Kern-Arau dialyte on Plaubel Peco Jr board (No; It's not heavy at all. A lightweight set).
You can also see how I trimmed down the original Wista board (also $20) with my power scroll saw and attached that to the Plaubel board, again using teeny tiny modeling brass screws from the local hobby shop.
Daniel Unkefer
6-May-2018, 14:14
I bought an assortment of sizes, these are all usuable depending on what you are fabricating. Google "hobby modeling screws" and there are plenty of sources.
I use a mini drill press to drill the holes through the cone and the board, then use nuts and screws to hold it all together. I even use some stuff I bought at the local Home Depot in the hardware department. It's not that critical. Flat back spray krylon (sprayed onto a cardboard and applied by brush) is your friend.
Here is one source if you don't have hobby shops in your area: https://www.rtlfasteners.com/
Daniel,
Thanks for the additional detail. I love improvising and using found materials, so this approach appeals to me greatly.
I’m now trying to determine how long of a tube I can use and have another thread posing the problem.
Many thanks,
Paul
I bought an assortment of sizes, these are all usuable depending on what you are fabricating. Google "hobby modeling screws" and there are plenty of sources.
I use a mini drill press to drill the holes through the cone and the board, then use nuts and screws to hold it all together. I even use some stuff I bought at the local Home Depot in the hardware department. It's not that critical. Flat back spray krylon (sprayed onto a cardboard and applied by brush) is your friend.
Here is one source if you don't have hobby shops in your area: https://www.rtlfasteners.com/
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