Hi paulo, welcome to the forum,analogue/digital now thats the big question all new to va asks,and one of the most controversial on some forums, both have there pros and cons. My personal view is if you can afford both ,,get them lol. Analogue camera In my personal experience and what I have done with them... Samsung scb camera with intregration( slow shutter / long exposure ) to under 10 seconds,, can get a bit noisy due to internal heat,,I modded mine with one internal fan and three external fans,this brought the temp to ambient,,never got any success fitting a Peltier,,but ken dragonman has,, this I used with sharpcap software and before the mod it dropped frames,,none since cooling mod,,the camera can be rigged to a tv for viewing in analogue also the signal can be split via t connectors to a usb grabber fitted to a computer,this changes analogue to digital and allows manipulation via software and stills and stacked images can be done,I have a cctv dvr that I can connect four usb cameras into my set up and record four separate camera views..so analogue has some great advantages over usb cameras.. mallincam have the best analogue cameras but come at a price,,the revolution camera set up is a great camera to buy for analogue and the r2 version is well regarded.
Usb cameras,, now the technology here has jumped in the last year,most cameras prior to this was guide cameras,but the turning point in my view was the lodestar live program developed by paul shears,,this was a game changer and made the lodestar range of cameras very good,,other manufacturers have seen the intrest in va get bigger and are producing dedicated va cameras,,attik,zwo to name a few,,these are now coming with built in cooling as well. For portability and quick set up and keeping up with technology,,usb is the way to go,, but for a lot of long term video astronomers analogue has a very nice appeal. Davy
Davy gives good advice above. No point me typing the same thing because I agree with him and he's already typed it.
__________________________________________ Ken James - Snake Valley Australia CAMERAS: Samsung SCB-4000, Mallincam Xtreme & Xterminator, 3 different Revolution Imagers, 2 ToUcams, SX-5c, Canon 350d, 2 different IMX224's (an RI & RT) and an RT178. Broadcaster on NSN as 'Snake Valley Australia' HERE --> www.nightskiesnetwork.com/ - Video Astronomy Website: ballaratman.wix.com/videoastronomy
Post by Rick in NWArk on Aug 28, 2016 17:57:02 GMT
Welcome to the forum, Paulo!
Davy gives you good advice! You might want to also consider size of pixels / number of pixels in the chip, too. Many small pixels are good planetary or small-scale lunary cameras, and are frequently a USB camera. Fewer larger pixels are great for DSOs. However, with software stacking, small pixel cameras are now catching up in the DSO space.
We also have to bring the scope into the equation, at f10 it's very slow for video astronomy,most prefer fast refractors or fast Newtonian f5 scopes from skywatcher,you want to gather as much photons as possible and as quick as possible,you can add a .7 matched focal reducer this will speed it up one full f stop to f9,it will also give you a wider field of view,, hyperstar added to your scope takes it down to f3 I think but its big bucks..hope this also helps