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I wonder if someone can please help, I'm fairly new to astrophotography and confused about aperture. Basically I'm looking at a Canon EF-S 55-250mm lens. It has the specs
f4-f5.6 does this mean that the lowest point of aperture possible is F5.6 or will it go lower. What I find confusing is that I have a lens that's the EF-S 18-55mm lens which has the specs of f/3.5/5.6 however My camera does allow me to set the aperture at f/8 The reason I ask cause it is advised to use a low aperture of f/8 to capture images of the moon.
Any help and guidance would be greatly appreciated!
Just thought i'll bring this up as a point of discussion. Today, cooled CMOS Astro Cameras are available in plenty. QHY, ZWO and other variants of the same camera are selling for very reasonable prices. However, there was a point of time when astrophotographers used to cool down their DSLR's as a cheap OSC alternative to CCD cameras. Give a choice, I would've purchased a dedicated CMOS OSC which can cool to 40 C below ambient, but since I had a Canon 500D which I had self modded, I requested a friend Kaustav Chatterjee (an avid model railroader) to cold mod my 500D (he had cold modded his 1000D long back). This newly modded camera has a TEC12703 single peltier and cools to approximately 20 below ambient.What do you guys think?
By LR Watanabe
I’m looking to do Milky Way Astrophotography, and I’m hesitating on whether I purchase the Full Frame camera that is the 5D Mark II or the APS-C EOS 600D.
I plan on using the Rokinon/Samyang 14mm F/2.8 wide angle lens, although I’m open to suggestions so long as said suggested lens is under 500$.
The mount I use will be the iOptron SkyGuider Pro with the counter weight supplies in the set.
If there is an alternative to the cameras listed above that goes for less then 400$, I’m willing to hear it.
Thanks a bundle,
Last week on august 5th we were treated to a coronal hole followed by some G1 auroral activity here in New Zealand.
Unfortunately I live a bit too far north to capture the spectacular Auroral images.
However, ever the optimist, I set my canon 6d with a Samyang 14mm lens up in my backyard and captured 300 or so shots (20 seconds at iso 3000) which I then sent through to lightroon timelapse.
I'm quite pleased with the result. Definitely some colour there.
Ladies and gentleman,
Thank you for helping me in advance.
As a kid I've always been fascinated with the sky and what was in it. The nights sky is filled with beautiful stars and nebulae and I want to see them for myself and be amazed how insignificant we really are compared to this vast open space. So let me adress some of the key points that I want for a first scope.
1. Around €1000
2. Big aperture, I want to see as much as possible and as far as possible while not losing a clear image
3. I would like to have a push to or go to system
4. Beginner friendly
5. Size is not a problem
8. I prefer reflectors since it seems they give more aperture for the money but if you know a better scope that sees more with less aperture let me know
9. I have a Canon 550D and maybe I could use this for a bit of astrophotography. This is last on the list tho and can be scrapped if the first 3 points aren't met
Of course build quality is very important when making my choice so keep that in mind as well.
I'm looking forward to you guys advice.
Happy stargazing and clear skies!