Does this Refractometer come with a Filter for Monochromatic Lighting? There are Two Distinct types of lighting absolutely necessary for accurate R.I
947146
I purchase this refractometer and it works well. it has internal monochromatic lighting
457479
I'm not sure of your question.. Li means nothing to me unless "light index" or something like that. RI is the standard term for "refractive index" which is what this device measures. Older testers used a very nasty and short lived chemical to bond a gem to the tester, and they had an analog readout. The accuracy of this is at least as good as the older machines.
288210
Yes. It comes with a 2x magnifier. It narrows your field of vision quite a bit and sort of defeats the point of a red for for me.
2002814
No, it does not. However, it is compatible with a night vision add on. Essentially, the red dot dims so you don't get blinded by the night vision device when it amplifies ambient light and or utilizes IR.
1130897
It doesn't. It could be the light. But I think it's a description for the large model. Still a great filter. Mine works great.
1076452
I still have the box. I will see if I can find information.http://www.pegasuslighting.com/optivex-uv-filter.htmllook at this one
2219426
Thank you for your inquiry. The camera does not need filters but you may find that the image that the camera produces can be improved upon by using filters. For light pollution, you would want to use our Orion 5660 1.25-Inch SkyGlow Broadband Eyepiece Filter, for planetary viewing, you would want our Orion 5188 1.25-Inch Jupiter Observation Eyepiece Filter and our Orion 5599 1.25-Inch Mars Observation Eyepiece Filter. Solar filters are designed to fit on the objective end of your telescope so that all of the optics are protected. We have a number of solar filters - you should measure the outside diameter of your telescope and then select the appropriate filter for your telescope. Here are some solar filters you can check out:
129554
No one item alone will positively identify a colored gemstone since many synthetics have the same optical, chemical, and physical properties of natural stones. Generally, it is a combination of different instruments that help in identification, and then that needs to be coupled with experience in separating some synthetics from natural. A refractometer will give you the refractive index of a gemstone, and in some cases that can serve as a positive ID if no true synthetic has been produced for that particular stone. But even then, the r.i. of some gemstones overlap each other, as well as being the same color, which makes other testing necessary.
2208671
Yes. There are a few of them. Some with optical glass in them like the one I bought, which makes up for the difference in mount to focal plane in FD mint vs EF mount. The extra piece of glass can findings cause some haziness though depending on the weather
895790
No, but its intensity does change depending on the amount of light that it is hitting the sensor.
470917
Some models come with a UV filter and some don't. As I ready had a stand alone UV unit, I bought the cheaper unit w/o UV filter. I would hope that the product specifications, based on the size of the unit, would include that information. Sorry, but that is the best I can do.
271077
No alignment of this type is required. In fact if a refractor is not working if must be repaired as there is no user alignment.
1707894
There is no research on light filters that I have found. I bought the "white" because it dims the light without color - helps with migraines.
1602458
No it does not, however when using eyepiece projection you can attach the filter to the eyepiece.
1515985
Yes, it takes standard threaded filters for 1.25" eyepieces. As an alternative, have you looked at variable polarizing filters such as: Meade 07286 No.905 1.25-Inch Variable Polarizing Filter?
1253935
After using it, you can inspect it with a magnifier. I saw no problem and continued to use it on my lenses and filters. I'm happy with mine.
1549674
The flashlight itself is an IR light. So no filter is needed. It does not produce a visible light, like a typical flashlight.