Thanks for the link Gordon. I just read the "Camera Labs lens buying guide". It is very nice and very helpful. Thanks.
HI, Citruspers. Yes you are right, if you are taking photos night sky, twisting the lens completely to the right does not make the lens to infinity as per my experience goes. Infinity is just little before the focus ring stops rotating, when you turn it to right side.
Also, it depends upon lens to lens. So, where the Live-View is not available, like in my case, I take a shot zoom to max and see it the star is sharp.
Stars do not appear round as they are point sourced objects, this is because of the distance. So, focusing needs to be adjusted until the star/s appears as a small dot/point.
Gordon, I have a telescope (6" Newtonian), I use A-Focal method to photograph the moon. Yes its quite a hard thing to focus, but still photographing moon with scope and dslr combination is now much easier for me than photographing the Stars.
So, I am sure I should not have any problems photographing the Sun. Yes, there might be some issues when taking care of the exposure part!
I have one more question (there is so much to learn, cant stop
). I was checking out the "Custom Functions" in my camera 400D they are quite confusing.
-> Shutter/AE Lock Button
-> AF-assist beam
-> E-TTL II
-> Shutter Curtain sync
I have checked these in the manual but the info provided seems to be less.
.... Plz let me know if there is site/link which can describe these in detail.