[Garyh]

Originally Posted by Satchmo

Have you got Ronchi for Windows?

http://members.aol.com/RonWin20/

You can make a cardboard template if you print it out full size . I'd recommend a template of the outside edge of the centre two bands. Set a focus position that has plenty of bend on the outer zones. Just do an outside focus mask , and run a white board marker down the outsides and wipe off with metho after you've done your evaluation.

Cheers

Thanks, yes I have downloaded that for my last mirror as well as Figurexp and Coudermask. All fantastic freeware.
What a great idea of marking the lines straight on the mirror while testing!
Thanks for that tip!

Originally Posted by rochler

Nice project, your mirror has a real kick@ss bevel hehe....

How do you get your ronchi pix? Have you got a webcam setup for this? If so, how did go about it. I'm keen on doing the same so I can accurately see where I'm going with figuring.

Looks like you even ground the edge of the mirror (how did you do that?)

Cheers & good luck on finishing it off.

Thanks I beveled and done the sides with a lapidary grinding wheel. Finished it off with wet and dry paper (wet) and a block.
Did go a bit overboard with the bevel hey!
Images are taken with a little point and shot digital camera. My DSLR lense is way too big to fit in behind the ronchi grating and slit post.
I bit fiddly but can be done!
cheers Gary

Originally Posted by Alchemy

your 6 incher has produced some superb images , if its as good as that one, were in for some really good pictures.

Hey thanks Clive, I will be very happy if I can get a similar figure on this mirror as well!..
I will give it a good try!
cheers Gary