umphotography wrote in post #17906739
The sigma sport is very fast focus. It was faster than the Tamron by a lot. I Hvae the 100-400V1 and felt it was not as snappy as the canon but it definitely was no slouch. Build build build. The sigma contemporary and the Tamron feel cheap and toyish compared to the canon and the Sigma sport. The sport is a tank. Great build. I think buying to use a lot and long term serious use is a no brainer....Canon and Sigma sport are the choices. Then 400 v/s 600 comes into the equation. And now, with usable 25000 ISO on the D5 and 1Dx2, portability and reach will change the decision process even more.
Im going to rent the 150-600 siggy and get it out with some TC's next trip and I can really make a good decision for me. But Right now, all disposable cash is going to the 1Dx2. Siggy is going to have to wait a while. Great lens in my opinion. I think on the 1Dx2 with so many focal points that will be F/8, its going to be the lens to use. Very hand holdable and with fast shutter speeds and F/8 the world is waiting for you to arrive. 600x1.4 at 25000 iso means your gonna get right on them when they are most active.
I am so glad I jumped on the 300F/2.8. Im going to be out and about with a TC. Its close to 500F/4 and I can hand hold with shutters in lighting that was not possible. Go read and understand Oles field reports before you buy. This update is huge. Going to change the decision process for everyone.Its going to make you reconsider what you really need. F/4 glass is king of the hill. Hand hold F/4.0-5.6 is now very desirable in my opinion because I would gladly give up F/4 for portability and being able to get close and hand hold......Now factor 600MM into this....not a hard decision to me.
D5 field report- Read and understand where its going before buying is my opinion
http://oleliodden.com …eta-test-report-nikon-d5/
Actually i want to have this Sigma sport, many said it is not much worth it, but you explained why it is worth it, and i don't force myself to not go to the best option, if i can't afford it now then i can afford it later next year and i never look back, i didn't use 100-400 v1 much at all, but i bought it in long time ago just as effect of GAS, and i won't give up this FL or similar just because i don't shoot, i always prefer to have something for even one time shoot than never, renting is cheaper but not in all conditions.
I just not in rush much, i may sell my 100-400 in mid of this year, then i will see if i need reach more or not, i have 1DX and it is still very capable for high ISO, but i have to decide between 100-400 v2 or Siggy sport lens, i can't afford both and as you said i am not looking at Tamron or Sigma contemporary, and i have a plan in the future not sure when that i will travel for Safari and birds, and i don't think i can afford longer primes yet, and i already have Canon 300 2.8IS, so i can use it with 1.4 to be on 400 FL, tough decision when we are still in Canon dress and not trying to dress another brands much, it is all about how much budget i can save until i decide something.