Loupes for analyzing grain and pixelization of printed photos for scanning.
Dec 20, 2017 15:38:52 #
RWR wrote:
I wouldn’t think you’d need more than 10X. I have a 6X Rodenstock loupe that covers an entire 24 x 36mm negative, which I use for ground-glass focusing and examining finished prints. I use a 15X Peak #2016 loupe for evaluating transparencies. I don’t know about the cheap knock-offs, but I also have an original Agfa 8X loupe that is quite sharp except for the very edges.
Thanks for this information RWR. Along with other suggestions loupe wise, it puts me in the ball park and will help me make a more informed selection. Much appreciated.
George
Dec 20, 2017 15:40:53 #
John_F wrote:
When I was doing minerology the 10x loupe was recommended. I still have it.
Thanks John, your recommendation is in line with others who suggest 10x magnification.
George.
Dec 20, 2017 15:50:34 #
jackm1943 wrote:
Why not just scan a small area of the print at maximum resolution and take a look. That would provide much higher magnification than any loupe, I think, and would not take much time.
Thanks for your input Jack. The process involved is bulk scanning. What you are suggesting would be too time consuming. In general, results are acceptable when digitized. On occasion, some scans are not acceptable to the customer and in this case we need to determine if the original is the cause or not. We can then better manage the solution with the customer when the original can physically be magnified for investigation as needed.
Dec 20, 2017 21:17:03 #
you might want to take a look at the inexpensive computer microscopes. You can buy for less that $80 and have a large picture on your computer screen that is from 10X up to 60x or so. (You can buy much higher magnifications with a much higher price) I bought one on eBay for $60 and it is well made with good quality work. I use it to check gemstones for flaws and faceted faces for potential re-cutting and/or re-polishing. Most come with software and very easy to setup and use. A standard jeweler's loupe does not show enough area to be useful. You can also take a look at map makers magnifiers that are on legs the right height to focus on a map (or other printed matter). Hank
Dec 20, 2017 21:23:54 #
hankswan wrote:
you might want to take a look at the inexpensive c... (show quote)
Thanks for your suggestion Hank. I appreciate that you took the time to share this information.
George.
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