Canon 300mm F4 L for imaging

[Fay]

Does anyone know how the above lens performs doing astro imaging?

Fay

[alan potts]

I am no expert but I have pointed my larger L lens to the sky and it worked very well indeed. The 300 F 4 is a really good lens, I had one once some years back but got a faster one and empty wallet.

The image I shot was a 6 minute exposure of somewhere near Deneb ( see what I mean about no expert ), there was a bit of noise but the stars were fairly sharp considering I didn't make a massive effort aligning the mount. I see no reason why you could not do similar.

Good luck,

Alan

[Fay]

thanks for that Alan. i dont want to spend a LOT of money if it is not good for imaging

Fay

[pete_l]

thanks for that Alan. i dont want to spend a LOT of money if it is not good for imaging

Fay

I assume you're not buying this just for astronomy.

However, if you're in to prime lenses and astro photography, have a look at Samir's website.

[swag72]

I used my 300/4 many years ago with the DSLR for astro. It worked well and it's also a great daytime lens!

[laser_jock99]

You might get some minor blue fringes on bright stars with these ED lenses but you should be able to remove these in software.

[Alien 13]

You might get some minor blue fringes on bright stars with these ED lenses but you should be able to remove these in software.

A little off topic but some canons have CA correction data within the camera i have used it with my Kit lens and it worked a treat.

Alan

[melsky]

The 300 F4L is a great lens here's a link to one of my images taken with it http://stargazerslounge.com/topic/175650-andromeda-galaxy-astrotrac/

this is the non IS version which has 6 less elements than the later lens but is reported as being sharper. A non SGL friend of mine has the same lens (but with auto focus duff) which he is selling soon, PM me and I can put you in touch.

Mel

[Fay]

i want to use it for normal photography as well.

meisky, what does "with auto focus duff" mean? is it not working?

Nice M31!

Thanks

[melsky]

Hi Fay

The AF doesn't work and the manual focus is a bit stiff which is fine for Astro but not for normal photography but it does mean it's relatively cheap. He'll be putting up on Astrobuysell soon.

Mel

[Fay]

ok thanks for that Mel, will keep an eye open for it, but i feel it will be  a little battle weary for me.

Fay