Paul Jarvis
Registered Member
It's sounds to me Roy reading between the lines it will only AF with the new sigma converters at f8, maybe sigma has put some clever circuitry in to confuse the camera.
That's no big deal for BIF Paul as the shutter speed needed will almost always do away with the need for OS anyway. A lot of folk will automatically switch the OS (or IS or VC) off when shooting flyers as it slows down the AF. Also if you are on a tripod there is rarely a need for OS anyway.Edit: also reading that their OS works when panning unlike what I have read about the Tamron
Maybe they are copying the Kenko DGX foolery Paul. As a side note the Tammy is not supposed to AF with a tc but I have heard of several people that use a non reporter on it with no problem (not the DGX). I was thinking of picking a cheap kenko non reporter to try myself.It's sounds to me Roy reading between the lines it will only AF with the new sigma converters at f8, maybe sigma has put some clever circuitry in to confuse the camera.
Better still on the 7D2 Miguel . I used to get AF at 840mm on my old 7D with my 300/2.8 + stacked 2x and 1.4x tc -1344mm 'reach' was handy at times that's for sure.I sure do hope so.
being able to have AF @840mm on a full frame camera would be something amazing!
The sports model at £1599 looks good value if it delivers the IQ at the long end.It says here that, in the US, the Sports version will cost $2000, while the Contemporary will be $1100.
http://sigma-rumors.com/2014/09/sigma-150-600mm-f5-6-3-contemporary-sports-differences/
Wim
That's true. But I will barely be able to afford the Sports version (if I decide) so I won't get another body. My wife would throw my things outside hehe. So 840mm is the best I can wish forBetter still on the 7D2 Miguel . I used to get AF at 840mm on my old 7D with my 300/2.8 + stacked 2x and 1.4x tc -1344mm 'reach' was handy at times that's for sure.
By the time it arrives Jeff the Tammy back orders could be for-filled and then the price will start falling - I reckon once the stocks of the Tammy becomes plentiful (and the grey importers start to get hold of them) the price will start tumbling, I would guess that in a years time it will be around £700.My gut feeling says it will come in as either the same price as the tammy or even a loss leader at under it which should hopefully start a price war .looks like 2015 is gonna be interesting .
At f6.3,
full frame really helps the bokeh,
7d mk whatever...
I would say there is no chance that Canon and Sigma has been talking here Jeff - it has been widely speculated and expected for ages now that the7D2 would always have AF at f8. The reason they have both been announced now is Photokina which is a traditional time for announcements for all Company's so why should it be coincidental that Canon and Sigma and others all announce new products at the same time.I also have a gut feeling that there may have been some behind the scenes development between canon and sigma it's very coincidental that the 7d2 with f8 focussing comes out at the same time as a sigma super zoom that will af at f8 with there new t.c .we will all find out shortly
The Tammy 150-600 is a very adequate lens in the right hands IMHO, I think the main reason why the Tammy does not appear to perform very well is simply because to vast majority of its users are inexperience photographers specially with long lenses.To put this in perspective I have a 1d3 so already have f8 AF albeit centre point only with a 400 5.6 and 1.4 tc ,I have tried this combo out versus the tamron for a days shoot and did not get enough of the WOW factor to sway me ,the only gain being in a few extra focus points .
I am hoping the sigmas wil do this for me ,I want the same af capabilities as I have now and at least the same I.q better if possible ,one thing I have noticed while scrolling through various sites is that the tamron for whatever reason tends to perform better on nikon bodies ,I wonder if this is to do with the fact most have sony sensor technology .