First off I just want to say that this is a wonderful thing you're doing.

I have this lens and it is quite heavy. It can be used handheld but I found that a monopod also works well for me. It's more flexible than a tripod and, as long as he can turn the engine off, it will provide a good amount of support while in vehicle.

Regarding the lack of OS/IBIS/VC, higher shutter speeds can also compensate and, in good light, I really don't think it should be a problem...as long as he practices.

One other suggestion, since you were able to obtain the lens for free, maybe consider throwing in an entry level 70-300. I know it overlaps the big lens but it may prove easier to use when 500mm (750mm equiv) isn't needed...You can get one really cheaply (around $100) and it's something he can practice with.

I am looking for an adapter to use my Sony A-mount glass on an E-mount body (A6000). I am looking at the Sony LA-EA2 or LA-EA4 bc it allows the AF to work. I see a LA-EA4 on EBay for a good price but its located in Austrailia. Is there any difference between a US version and an Austrailisn version of the adapter? Can I use it without any worry?

Thank you for your responses so far, quite helpful...

Yes, but doesn't the Sony version exclude VR because it built into the body of the a77? I may be wrong but that's what I thought...

Hello all, I have been reading the Hog for a while, but this is my first question. I am a hobbyist just learning (and loving) the intricacies of digital photography and I have an opportunity to pick up a used Sigma 50-500mm 1:4-6.3 APO EX DG HSM for a very good price, about $600. I will primarily be using this lens for sports photography, particularly swim meets, and eventually wildlife.

My issue is that I can’t test it out on my camera before I purchase it and once purchased, it’s a final sale. Although maybe foolish, given that it is such a good deal, I am considering (yet undecided) taking the risk nonetheless. I have read on Dyxum, however, that there are issues with this lens and the a77. Apparently, Sigma announced that auto focusing does not work properly when some older Sony fitting Sigma lenses are used with the Sony a77 and that they will be supplying a free update to their customers.

Has anyone experienced this and if so, how was it resolved? I am not sure what a “free update” actually means. Any advice is very appreciated.

I have the XP850 and use the same approach...it's not ideal but it does work...

Actually, it doesn't...it comes with an attachable evf...it seems most outlets are selling it with the evf and battery grip for about $1,200...