1966 jefferson nickel errors
rmuniak
Posts: 267 ✭✭✭
Recently posted about a greal haul I made with nickels. Amoung them was a roll marked errors. I just purchased a new AmScope300 and was able to look at a few of them. They had die errors(I believe) that were interesting but the best one was a (I believe) an alligator nickel. Is this one of them 
A world without coins "Chaos"
0
Comments
Sorry it's a 1966 plain jefferson
A world without coins "Chaos"
It’s a completely new landscape when you get down into those magnifications. That is a great pic!
Have fun searching... and certainly ask questions (with pictures) here...Good luck... Cheers, RickO
Looks more like a crawfish, tis the season.
Or a roach, lol
Well known die chip.
(and yes, it was called 'the alligator' back then)
Good eyes to spot it.
is there a premium on the coin I am only asking so I can list it in my collection at a certain value
A world without coins "Chaos"
I'd guess that if you put it up on Ebay for
auction, it would bring a buck or two......
Not rare, not in demand - but they are interesting
examples of die chips on coins.
Also does anyone have an AmScope300 with camera. I only have a lens that takes this size portion or smaller by a factor of 2. They sell a .5 adapter and the help desk refuses to tell me the size picture it will take. My goal is to be able to take pictures of full size coins. Is there a get around on this scope?
A world without coins "Chaos"
Did you go to the Amscope site?
https://www.amscope.com/
If you have the complete manual sometimes you can find part numbers for accessories/lenses:
https://www.amscope.com/download
Yes I went to the site and talked to the help desk. They were not helpful at all. They sent me a formula and this verbiage actually garbiage...
When using a camera with an image-sensor smaller than your eyepiece field-number, it is common to use a reduction lens, which reduces the size of the image projected by the objective lens, so it will better fit the sensor. The rule-of-thumb for choosing a reduction lens is to match the lens' magnification (which would be fractional, ie. 0.5X) to the die-size of the image sensor. The die-size, which represents the size of the entire sensor-die, is not the same as the size of the photo-sensitive portion of the sensor, so it will not match the listed dimensions which are used for calculating FOV. The die-size is often represented as a fraction, such as 1/1.8". As confusing as this may seem, it's nevertheless an industry-standard. So a 1/1.8" sensor is best-paired with a 0.5X reduction lens, and a 1/3" sensor with a 0.3X lens. Image-sensor's of 1" or larger are in a different category, and would not use reduction lenses, unless the microscope's FOV exceeds 1", which would be rare.
While using a reduction lens can help maximize the FOV of the camera, it still does not mean that the camera's FOV will match your eyepieces.
And this as well
Monitor Magnification
When viewing a camera's image on a monitor, the image-magnification is based on the relative size-difference between the camera's sensor and the monitor. To calculate the amount of magnification, measure the width or diagonal of the image on the monitor, then divide that number by the same dimension of the camera's sensor. So if a camera's image-sensor has a 1/2" diagonal, and the on-screen image has a diagonal of 23", then the monitor-magnification (mm) would be 46X. This only works if the entire image produced by the camera is seen on the monitor. If only a portion of the image is viewable, then the on-screen image will have to be reduced in size until it is fully visible.
To calculate the overall magnification with a microscope, multiply the objective magnification (mo) by the monitor-magnification (mm), as well as any auxillary lens, such as a reduction lens (ma).
(mo) x (mm) x (ma) = m
20 x 46 x 0.5 = 460
If you can tell me the magnification I will get on my camera you are another Werner Von Braun
A world without coins "Chaos"
This will help. More details and a chart to figure out what you may need is in the link.
“The most common type of Barlow lens is the Reducing Barlow. A Reducing Barlow reduces the magnification power of the microscope, but has the advantage of increasing the field of view and the working distance between the objective and the specimen. Reducing Barlows are typically 0.3x, 0.5x and 0.75x although other powers are available.”
https://www.microscope.com/education-center/microscopes-101/microscope-accessories-guide/barlow-lens
Thank you. The site gave me the answer. The field of view will be doubled.In essense quadrupled in volume
A world without coins "Chaos"