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Just Got My New Microscope Today.

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 Posted 03/20/2022  02:06 am  Show Profile   Bookmark this reply Add hokiefan_82 to your friends list Get a Link to this Reply
@Dearborn, thanks for the post, this convinced me to order one. It arrived the next day and I'm happy with the scope itself, but as you mentioned it's going to take some practice and I'll definitely need a better lighting setup.
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 Posted 03/20/2022  8:18 pm  Show Profile   Bookmark this reply Add Dearborn to your friends list Get a Link to this Reply
I'm glad you like it, I sure do. The 10 inch extension really completes the setup. With it I no longer need to disassemble and reassemble to get up cost them full coin images. As said lighting is paramount to getting good images. Have fun.
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 Posted 05/28/2022  7:43 pm  Show Profile   Bookmark this reply Add southsav to your friends list Get a Link to this Reply
I just read this again and wondering if technically impaired folks like me can find this really easy to set up and use.

Will it save direct to your laptop as jpeg? Would a digital stereo device be better? I really don't have the knowledge, just trying to figure out a better set up than what I use.

Thanks
Edited by southsav
05/28/2022 10:45 pm
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 Posted 05/28/2022  10:51 pm  Show Profile   Bookmark this reply Add Dearborn to your friends list Get a Link to this Reply
Well, When I got mine. I plugged it in to my computer and the system set up the drivers it needed and it works great. Yes, you can save jpg images directly to your drive. No need for an SD card..
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 Posted 05/30/2022  12:21 pm  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply

Quote:
I think I would prefer to call this item a zoom rail vs a focus rail. Basically the rail lets you get in close or far away (a rough focus, if you will) I then turn the lens assembly for fine focus it.


I missed this when you posted back in March.

Indeed the rail is a "focus rail", while the adjustment ring at the lens adjusts the "zoom". It is true that when in a fixed position of the focus rail, adjusting the zoom ring will adjust focus, but adjusting the zoom ring also changes the magnification, or zoom. Think of it this way...you can't change the magnification/zoom by moving the scope body up/down, can you? Moving the scope body up/down only changes focus.You have to change the scope zoom ring in order for the magnification to change.

Why is this important for coin photgraphers? Well, let's say you shoot a bunch of Dollars, and then a bunch of Dimes, and then go back to shooting Dollars. You'll probably want the second batch of Dollar images to be the same size as the first, right? This means you will need to have the same magnification, and thus the same zoom ring setting on the scope body.

Now if that hasn't confused you, then unfortunately the method to get that same magnification each time might put you over the top...

To calibrate a macro photo system, you first decide how much of the frame (vertically) you want the coin to fill. I usually choose 90% or 95%. You can do this most easily using a ruler with a fine scale. You must iteratively adjust the vertical focus rail and the zoom ring until the coin fills the desired amount of the frame, or until the ruler reads the correct amount. "Correct" for a Dollar to fill 95% of the frame would be 38/0.95=40mm. So adjust the zoom and focus until the frame height captures 40mm of the ruler. Then place your Dollar on the stage, and adjust the focus rail (NOT the zoom ring) until the Dollar is in good focus. Take a marker or pencil and mark the focus rail to indicate this is the position for Dollars.

Repeat the above procedure for each size coin/medal/etc that you would want to photograph.

Now comes the part that is counter-intuitive to the above discussion, but indeed is correct...let's say you have been shooting Dollars, and then want to shoot Dimes. You will move the focus rail to the position for Dimes, but you won't move it after that, instead using the "zoom" ring to focus the shot!! The reason this works is that for a given size coin to be in focus, both the zoom ring and the focus rail have to be in their exact positions for that size coin. To get repeatability, you can fix the focus rail and adjust the zoom, or fix the zoom and adjust the focus rail, and you will get the same result, but IMO it is virtually impossible to fix the position of the zoom ring, but fixing the position of the focus rail is relatively easy.

So if you're still with me, there is one more caveat...you must put the coins at the same height each time. This is a problem for slabbed vs raw coins. If you are shooting both slabbed and raw, then you might consider having a thin (a few thicknesses) piece of felt or similar to put the raw coins on to bring them up to the same level as a slabbed coin. Alternatively, you could calibrate the system for slabbed coins at 95% of the frame height, and then just let raw coins be a little smaller since they will be a little farther away from the scope.

Hopefully the above makes sense to all...Ray
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 Posted 06/16/2022  4:56 pm  Show Profile   Check GaryVanWa's eBay Listings Bookmark this reply Add GaryVanWa to your friends list Get a Link to this Reply
-Great info and great photos. Thanks!
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 Posted 06/29/2022  1:28 pm  Show Profile   Check GaryVanWa's eBay Listings Bookmark this reply Add GaryVanWa to your friends list Get a Link to this Reply
I bought one of these and will start using it today. Looking forward to seeing how well I do with it.
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 Posted 06/30/2022  09:42 am  Show Profile   Bookmark this reply Add southsav to your friends list Get a Link to this Reply
Got the same Tomlov DM201 over the weekend. Still playing with it.

Appears the focal point is the center of the photo. Outer areas look out of focus to me. I'm certainly no expert.





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 Posted 06/30/2022  09:58 am  Show Profile   Bookmark this reply Add Ham1947 to your friends list Get a Link to this Reply
Full coin photos look out of focus from around 4 to 10 o'clock. Maybe the coin is not level? Or the device is not level to the coin?
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 Posted 06/30/2022  11:32 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
A bit out of focus and a bit too much glare.
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 Posted 07/02/2022  12:16 am  Show Profile   Check 52Raymo's eBay Listings Bookmark this reply Add 52Raymo to your friends list Get a Link to this Reply
Hard to shoot through plastic.
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 Posted 07/02/2022  10:14 am  Show Profile   Bookmark this reply Add jafo50 to your friends list Get a Link to this Reply
Try using diffused lighting to reduce the glare.
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 Posted 07/02/2022  4:19 pm  Show Profile   Check westcoin's eBay Listings Bookmark this reply Add westcoin to your friends list Get a Link to this Reply
I'd bet even money the coin is not flat in the holder, a real issue I've found especially with NGC slabs. When dealing with a very limited depth of filed it is super important to get the coin level/perpendicular to the camera/film/sensor plane, not always an easy task, you can try tilting the coin or the camera in a 3-D plane, using a ball head or various shims is about all I have found to work.
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