Page 3 of 5 - Identifying eyepiece aberrations - posted in Eyepieces: Bright spot? Where in the field? Does it move as the star drifts across the field? Is it stellar or diffuse?
Page 1 of 4 - Identifying eyepiece aberrations - posted in Eyepieces: The purpose of this post is to help enable amateur astronomers to identify the aberrations seen in an eyepiece used in the scope. Note in advance that some of them are Interactive Abe
(MR) polarized perpendicularly to the axis (X) biasing said part (B) of the device (aN), does not pass or passes in a negligible quantity, whereby the positions on the retina in which images of the polarized parts of white depend on the refractive and accommodative status of the eye ...
Uveal melanoma (UM), the primary intraocular tumor in adults, arises from eye melanocytes and poses a significant threat to vision and health. Despite its rarity, UM is concerning due to its high potential for liver metastasis, resulting in a median survival of about a year after detection. ...
When the brown recluse bites, it is often painless -- then skin reddens, turns white, develops a red "bull's-eye," blisters, and becomes painful. These bites can be deadly in rare cases. Get medical care immediately. If you can, bring the spider with you for positive identification. ...
the forehead was used as a ground. Vertical eye movements (vEOG) were recorded with two electrodes placed above and below the left eye, and horizontal eye movements (hEOG) were recorded with two electrodes placed on the outer canthus of the left and right eye. The impedance was kept ...
Because of the diversity of desired uses and values on these lands, decision-making on public lands can be complex, requiring careful consideration of the trade-offs between competing objectives and values, and controversial. In the U.S., two agencies in particular—the Bureau of Land Management...
Types of Helminths Helminths are worm-like parasites that include flukes, tapeworms, and roundworms. Helminths are visible with the naked eye in their adult form but possess differing characteristics. Flukes Flukesare flatworms with bilateral symmetry and suckers on their underside. These suckers ...
Outstanding post! And, I thought I knew something of eyepieces. This one is printed out and stays near the top of my reference literature. #32tommm Apollo Posts:1,487 Joined:16 Dec 2015 Posted02 January 2016 - 03:11 PM May have missed it, but I didn't see reference to the article...
It looks/sounds like you have both the 24 and 16mm eyepieces that would have been the two standard eyepieces to accompany the Questar when it was new. It looks like there's a third eyepiece in the eyepiece case pouch. What does the side of that eyepiece say?