tamron or sigma

[matty198111]

just wandered if any of you guys would happen to know which of these is best, or infact if either are any good

http://www.microglobe.co.uk/catalog/product_info.php?pName=sigma150500mm-osapodghsm-sony-f563-lens

http://www.bhphotovideo.com/c/product/335378-REG/Tamron_AF08M700_200_500mm_f_5_6_3_Di_LD.html

it will be for wild life and maybe the odd moon shot

also what is this, i have read it but not sure it seems to cheap for a 500mm lens http://www.overstock.com/Electronic...y-Mirror-Lens/3863149/product.html?cid=133635

p.s i have a tamron 70-300 is there anything i can buy that adds on to get me a little closer

mat

 

[matty198111]

wonder if this is any good

http://cgi.ebay.co.uk/Falcon-650-13...sFilters_JN&hash=item43a40e4d20#ht_3297wt_982

for taken pics of the moon

 

[srichards]

Never heard of rokkinon. This one is enormous!: http://www.overstock.com/Electronic...photo-Zoom-Lens-for-Sony/3871053/product.html

They're cheap. I'd be surprised if they're anything other than soft and MF only.

Check out the dyxum site for sigma and tamron reviews. I think the sigma is supposed to be better.