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Edge of field brightening

WebJul 22, 2024 · The objective of this study was to evaluate long-term change in shortwave irradiance in central Arizona (1950–2024) and to detect apparent dimming/brightening trends that may relate to many other global studies. Global Energy Budget Archives (GEBA) monthly data were accessed for the available years 1950–1994 for Phoenix, Arizona and … Web1 day ago · The field appears to be flat with no need to refocus center to edge. Stray light seems well controlled as is light scatter around bright objects like planets. They work well together as a pair in binoviewers since they are fairly light and compact. There is no noticeable kidney beaning (SAEP), other blackout types, or edge of field brightening ...

EOFB - Eyepieces - Cloudy Nights

WebNov 18, 2024 · edge of field brightening.jpg. Apparently there are technical issues, please wait patiently . You do not have the required permissions to view the files attached to this post. See Far Sticks: Antares 105mm f/15 (modified), AOM 105mm f/9.5, Celestron 150mm f/8 (modified), Stellarvue NHNG DX 80mm f/6.9, TAL 100RS f/10, Vixen SD115s f/7.7 WebSep 23, 2009 · Page 1 of 3 - Eyepiece outer field brightening survey - posted in Eyepieces: I think it might be worth it to see how many people have noticed this effect and with which eyepieces. Ive commented on it a few times and there are a few people that seem to see the same thing I am seeing.The effect Im talking about can be described … the topher kia https://karenmcdougall.com

Omegon Eyepiece Redline SW - Eyepieces - Cloudy Nights

WebAug 7, 2024 · Overall the 9mm expanse was the worst of the three. It had the most difficult eye placement. It had the worst edge performance and some edge of field brightening. If Agena had the BST UWA in stock I would say go with them for $55. WebSep 21, 2013 · Field curvature is an issue with the telescope itself, a short focal length refractor or an non-Edge SCT has significant field curvature. Mark's 4 inch F/5.5 Doublet would be more than a millimeter out of focus at the edge of a 30mm UWA eyepiece. WebJan 5, 2024 · Page 2 of 19 - EOFB - the new eyepiece disease for neurotics - posted in Eyepieces: A few additional thoughts to add to my last post. When I first started discussing Edge of Field Brightening I described it as Edge of Field Lightening and I think Jon is correct that Don first responded with the terminology Edge of Field Brightening. At any … set up spectrum email on ipad

6mm Orion Expanse vs 6mm Agena Enhanced Wide Angle

Category:25 Paradigm/Starguider Disassembled - Eyepieces - Cloudy …

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Edge of field brightening

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WebMar 17, 2010 · The thing I'm noticing is that there always seems to be a brightening near the edge of the FOV - say the outer 10% of the field. I notice it in all of my eyepieces although least in my 24mm Brandon. I notice it with both scopes although more strongly in the Celestron achromat as compared with the Antares achromat. WebMar 22, 2024 · The 1.25 inch ES 82 degree eyepieces claim 15 mm of eye relief but the eye lens is only 17 mm in diameter and as you say, it's recessed. At the edge of eye lens, a 82 degree eyepiece with a 17 mm eye lens can only have 10 mm of eye relief. The 28 mm UWA has a 27 mm diameter eye lens that's has minimal recess.

Edge of field brightening

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WebJun 17, 2008 · Well, how exactly does RD, rectilinear distortion, affect the edge of the field? Well, it can have two signs: positive or negative. We usually use the terms pincushion or barrel distortion. Pincushion distortion curves straight lines near the edge by …

WebNov 18, 2024 · It could also be that what's really going on is centre of field darkening. After all, central rays travel through the central parts of the lenses, which are thicker. It could … WebDec 10, 2024 · The latter can affect night vision, especially in a light polluted environment and may, perhaps, be mistaken for edge of field brightening. I agree with the bolded part of your statement. I would also add that moisture lower in the atmosphere does tend to induce EOFB in every eyepiece. There has been many nights when I have EOFB in all of …

WebJul 3, 2011 · EOFB stands for "Edge Of Field Brightening". The phenomenon being described is one in which the sky background across the field of the eyepiece is not uniform. Instead the background appears darker in the center than near the edges. WebNov 28, 2005 · Most eyepieces with EOFB have a narrower band around the outside of reduced contrast, and, of course, the edge is round, not square. And often the brightening at the edge is more subtle. But this comes close to the worst case I've seen, and I wanted people who have not seen it to know what it is that those of us who have are seeing.

WebJun 10, 2015 · EOFB stands for edge of field brightening and pertains to eyepieces. It seems that certain eyepieces get brighter toward the edge of the field.

WebJun 10, 2015 · EOFB stands for edge of field brightening and pertains to eyepieces. It seems that certain eyepieces get brighter toward the edge of the field. I've never seen … setup spectrum on smart tvWebMay 2, 2012 · Pros - Equal to or less than the edge performance of ES, Slightly better center performance, Less edge-of-field brightening, Possibly better contrast at least under brighter mag 5 sky conditions, Generally more eye relief than ES, Easier (for me anyway) to see the entire field-of-view, Viewing comfort very slightly better than ES, Adjustable ... the topher grace cutWebSep 29, 2010 · Mediocre edge quality, relative to even simple, uncorrected designs like Plossls. Uneven brightness across the field . The one bright spot was the centre was very sharp and contrasty. Very good build-quality. Far better than the crude black anodizing seen on some other eyepieces. the topher mazda