WebSep 15, 2015 · the Longer focal lengths do handle false colour quite well in the ideal world an Fraunhofer lens performs superbly unfortunately not a lot of them around I think there is a company called scope stuff of some other similar brand name Altair do a high end Achromat which is called (Altair starwave 152 v3 has japenese Ohara and German … WebJun 12, 2024 · If I can simply add a filter to reduce CA in the Solar achromat plus achro Barlow, that to me sounds like a better investment than trying to get new tube rings for a Bird-Jones. ... If about 1500 mm of focal length equals about one Solar angular diameter in a Canon APS-C sensor, then 500 mm is about 3 Solar diameters and 1000 mm is about …
fringe killing for DSLR Solar imaging in Barlowed achromats
WebNov 30, 2006 · The achromat filter allows auto focus working distance of abt 9cm-10cm in PAF mode at full telephoto zoom, compare that to the stated 80cm, its a HUGE increase. Moreover you can still use the on board flash. The frame filling for PAF plus achromat filter is roughly the same with supermacro MF at about 4cm across. WebJan 18, 2024 · Sony a7R III Canon EOS Ra +1 more. Reply Reply with quote ... With achromat, there are filters made to block blue, gaining resolution at the cost of color shifting and loss of signal. For uv, lensrental did a pretty thorough investigation of spectrum of lenses, filters, and tested the effects of many filters on pure resolution. ... simple cw keyer
Astrophotography and UV filters - Digital Photography Review
WebThe Daguerreotype Achromat 2.9/64 Art Lens optical construction has been redesigned to allow both ethereal soft focus from apertures below f/4, or razor-sharp results with deep … WebJul 10, 2011 · Closeup filters are small, lightweight and you do not lose as much light as with tubes or teleconverters. The Achromat Marumi 330 +3 is your best bet. Pair it with your 70-300 VR. It will give a reproduction ratio of about .67 or so at minimum focus distance (better than 1:2). You can still use VR and the IQ of the double-element lens is great. WebMay 18, 2010 · Mounts and filter threads can be attached with Super Glue if necessary. This lens also includes an old iris diaphragm I found for $3 at a local surplus shop. Attaching rings from junk filters to both the focuser … raw fish lemon juice