Celestron CGE-14 | 1972, 1974,1977,1992 C8's | Tak Mewlon 250 on AP 900 | Tak FS-102 on EM10 | Tak FC-50 | Vixen VMC200L | Pentax 100mm f/12 on Pentax EQ | Meade 127ED ON LXD 650 | 3" Bardou & Son | TeleVue Ranger | Pentax J60 | Dynascope 8" f/8 | Meade 10" f/4.5 Starfinder EQ | Favorite Scope ever: 12.5" f/6 Cave https://sites.google.com/site/...magingrolandochavez/
Quote:Nice series of images, good job!
1986 Compustar C11 ASI120MM, Flea3, DMK21, Toucam Astronomik Type2 + IFW Wheel ST-4/C90, Nikon D70s
Quote:after many attempts I realized that taking pictures during the day with the sun still high is useless though some say the opposite. Even if the planet is more 'high daylight absorbs the UV!
I ache, therefore I am
Quote:Quote:after many attempts I realized that taking pictures during the day with the sun still high is useless though some say the opposite. Even if the planet is more 'high daylight absorbs the UV!Not in my experience ... daylight does reduce contrast in the UV so you have to record with very low gamma. In my experience so long as Venus is above about 35 degrees altitude and the Sun is lower, you stand a chance of getting some sort of image. This apparition is impossible for me, at this latitude the Sun is always higher until Venus is practically on the horizon ... but I did get some reasonable results with a lot less aperture than you during the last evening apparition.
Quote:Stefano, Brian, thanks for the feedback. For my last Venus attempt, I set the gamma to the usual 0.5 and cranked the gain down to nothing. Next time, I'll switch them and see what happens.
Imaging Editor, Sky & Telescope Magazine
Quote:no, I don't mess with the camera's gamma to boost contrast, because it leads to the dreaded "onion ring" kind of artifact. I simply allow the background to be bright, and use curves in Photoshop to suppress it afterwards. The image I posted captured on 3/20/2012 was recorded when the Sun was about 20 degrees up, while Venus was 61 degrees high.