Suggested sources for ground glass focusing panel for a Graphic 23. Bright but not obscenely expensive. Fresnel lenses of the same quality.
Suggested sources for ground glass focusing panel for a Graphic 23. Bright but not obscenely expensive. Fresnel lenses of the same quality.
Recently I've begun making my own ground glass screens, it's far simpler than you'd assume, plenty of advice available online. I needed 5 screens from 9x12cmm to 10x8 so buying commercially made screens was going to be expensive.
I bought a fresnel from Globalmatters but I DON'T recommend dealing with them after my experiences last year.
Ian
Steve Hopf for the GG, he's "photofixation" on eBay. Great GG and great to do business with.
hopfsteve@gmail.com
Cheers, Steve
DittoOriginally Posted by Steve Hamley
Call me a sissy, but I'd really like to see the MSDS before using this -- sounds like there's hydrofluoric acid involved.
They are ill discoverers that think there is no land, when they can see nothing but sea.
-Francis Bacon
Regarding Fresnel lenses, Edmund optics has quite a large assortment on catalogue, but they are relatively expensive (well it depends what you call "expensive" !)
http://www.edmundoptics.com/onlineca...productid=2040
I have found an A4-size Fresnel lens, f.l. = 310mm, for a few euros (4.90 !) here,
http://www.astromedia.de/shop/fresnellinsen.php
IMHO it would be a good Fresnel for a 8x10" camera but I'm not ready yet to "step-up" above 4x5" !!
Too bad that Astro Media, Germany does not have an A6 (105x148mm) Fresnel lens of 150 mm f.l. for 4x5" @ 2.99 euro !
post scriptum : the rule of thumb to choose your Fresnel lens is : surface covering your format and same focal length as the diagonal of your format, F/1 is something standard for a Fresnel lens@ 4.90 euro
However they have a 100mm f.l. Fresnel with a diameter (durchmesser) of 108mm : the perfect match for a 6x9 camera, price is 2.30 euro !
As far as ground glasses are concerned, Geert van den Broek in Belgium seems to have temporarily (I hope : not forever) stoppped marketing his ground glasses.
http://www.sheetfilm.be/
Too bad since the assortement was large and the prices very affordable, in the 20-30 euro range for a 4x5 (quoting from memory), people on the French MF/LF group who managed to get one of Geert's GG's were happy.
I also recommend Steve Hopf.
Steve Hopf is the man. His prices are reasonable and he'll clip the corners, apply a grid, whatever you need. He also responds to email almost instantly.
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