What is the diameter of the magnifying area?
621877
3 1/4 inches with an inset of a stronger magnifier of about 1 inch diameter
621878
The over all diameter is listed as 3.5 inches however it is actually only 3.25 inches of (1.75X) magnification with (4x) magnification bifocal lens which measures 1 inch in diameter.
621879
I assume you mean the bifocal area which is 1 inch diameter. The diameter of the magnifying area is stated in the item description.
1031233
I'm estimating about 2.5x to 3x. For higher magnification, you may have to go for a smaller diameter. I like the wide field of view the 4" glass gives. It's a beautiful magnifier and comes in a very nice box (in case you have gift-giving in mind).
1193215
1.25 inches, it is the diameter. You need an adapter to used it in your telescope or a 0.965 inches eyepiece.
1193216
The outer diameter of the eyepiece is 1.25" or 1.25 x 25mm = 31 mm approximately. Another issue to keep in mind is that this eyepiece is not a lightweight, and therefore not suited best for really light scopes.
1703406
The beam spreads out as it gets farther away. It has an 8 to 1 spread ratio, so at 40 centimeters, the read area is a 5 centimeter diameter circle. It doesn't list a maximum range, but as the target gets farther away, the measuring circle gets large enough to be useless.
1034626
It is 4". It also has a 7/8" dia. power spot lens within (5X magnifying lens).
1245420
I didn't measure but the glass part is about .5 inches. The lens is very small and very sharp.
299513
The bend to the magnifier is only about 12 inches. If you include the magnifier, it is about 24 inches.
59286
I have not measured out any area to view with the scope, so I can not be certain. As the mount for this device is not particularly great I usually end up putting the plastic ring around what I intend to view & zoom in to focus. Is it possible to take 1 cm2 shots with it, likely yes though you will have to experiment with focal lengths to get the magnification & field of view that you want. This device is more of a toy than a piece of lab equipment mainly due to the iffy base & the magnification dial's placement. If something more lab grade that is what you are looking for I recommend a more typical microscope such as this one: http://www.amazon.com/iOptron-ST-80-Digital-Microscope/dp/B0032VFC84/ref=fs_patw_1 It has higher magnification, a backlight, & multiple objective lenses. I hope this was helpful.
596484
I would guess about 4 inches. It's a bit smaller than the width of the globe.
2033941
The screen is actually a magnifying glass. It is 5 1/2 inches in diameter. My wife says it's more than enough for the work she plans on doing with it (it's a Christmas present & she hasn't used it yet) - beading, embroidery, cross-stitch etc.
1647100
I don't own it anymore, but as I recall, it's about 12" tall. 14" at the most. I returned mine because the magnifying side was very distorted.
824773
The diameter should be approximately 1.5 to 2 cm. The light emitted is pretty good compared to the size of the light. The light beam illuminates very clearly up to 2 meters
252926
The diameter is 1.25". The focal lengths are 20mm and 10mm, but those are used to determine the magnification, while the diameter is the width of the eyepiece barrel. The 1.25" is considered standard size, although you can buy 2" eyepieces for much more money. Most telescopes accept 1.25, but the pricier ones accept both 1.25 and 2 inch diameter eyepieces.
1022899
The useful magnification is about 140x for astronomical purposes. Beyond this you're going to get fuzzy images. Don't be fooled by extravagant claims.
14465
The minimum focus distance is 0.15m. At that distance the magnification should be at least 1:1.
892726
My aging eyes and a metal rule indicate approx. 10mm ~or~ .375" in diameter (thickness).