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evelakes wrote in post #19116590
Do you use a adapter on this combo, if so which one do you use?

Yes, the adjustment ring adapter.

vk2gwk wrote in post #19116596
Yes, the adjustment ring adapter.

no problems with focusspeed and hunting on the Sigma.

evelakes wrote in post #19116600
no problems with focusspeed and hunting on the Sigma.

It will be interesting to see what AF life the R5 breathes into lenses that formerly had MFA and hunting issues with DSLRs. My G1 Tamron needs different MFA values for different focus distances, which means that you can only optimize for one distance at each of the two focal lengths that you adjust for.

Obviously, it is not going to focus as fast as my 400/4DO II does with a 1.4x TC in ideal AF situations where the system knows what it needs to do instantly, and the drive motor is the bottleneck, but if it is fairly fast and reliable, I could enjoy the zoom's versatility more (well, it won't even enable AF with my 90D, but I think the 90D has some kind of power restriction to the lens contacts that prevents some equipment combinations from working).

John Sheehy wrote in post #19116608
It will be interesting to see what AF life the R5 breathes into lenses that formerly had MFA and hunting issues with DSLRs. My G1 Tamron needs different MFA values for different focus distances, which means that you can only optimize for one distance at each of the two focal lengths that you adjust for.

Obviously, it is not going to focus as fast as my 400/4DO II does with a 1.4x TC in ideal AF situations where the system knows what it needs to do instantly, and the drive motor is the bottleneck, but if it is fairly fast and reliable, I could enjoy the zoom's versatility more (well, it won't even enable AF with my 90D, but I think the 90D has some kind of power restriction to the lens contacts that prevents some equipment combinations from working).

My G1 Tamron was much the same, I had to do MFA on the fly. That lens was a totally different kettle of fish on the R so I'm sure the R5 would be even better. Oh how I miss MFA'ing.......

robamy wrote in post #19116579

IMAGE LINK: https://flic.kr/p/2jBc​tAi Back lit Mallard by A & R Photography, on Flickr

Now thats neat. Swallows and ducks would have to be 2 of the hardest birds to shoot in flight and you nailed the swallow back a few posts and now the duck ...... and backlit to boot! Tack sharp.... Well done .

clipper_from_oz wrote in post #19116650
Now thats neat. Swallows and ducks would have to be 2 of the hardest birds to shoot in flight and you nailed the swallow back a few posts and now the duck ...... and backlit to boot! Tack sharp.... Well done .

Swallows in flight are a challenge to keep in the frame, if they are of any size in the frame, regardless of AF ability. You could shoot wide and crop hard with a hyperfocal f-number, but then your swallows would be highly pixelated, highly diffracted relative to their size, and very noisy. Getting a larger aperture closer is what gets swallow SNR and analog detail, but to get pixels-on-swallow, that requires a very narrow angle of view, too, which is where the tracking gets difficult.

John Sheehy wrote in post #19116669
Swallows in flight are a challenge to keep in the frame, if they are of any size in the frame, regardless of AF ability. You could shoot wide and crop hard with a hyperfocal f-number, but then your swallows would be highly pixelated, highly diffracted relative to their size, and very noisy. Getting a larger aperture closer is what gets swallow SNR and analog detail, but to get pixels-on-swallow, that requires a very narrow angle of view, too, which is where the tracking gets difficult.

All good point and... if you can see or position yourself where they're landing often (nest boxes) then you're able to get shots of them in the same plane of focus but still in flight/isolated.

robamy wrote in post #19116579

IMAGE LINK: https://flic.kr/p/2jBc​tAi Back lit Mallard by A & R Photography, on Flickr

Rob, you are rocking the 400mm lens on R5. It is making my 1dxiii/R5 decision very hard.

Just got the R5 yesterday our Oliver with the RF 24-105 f4 and the Roses with the RF 24-240 going to like this body but will take awhile to tweak it to my likes

robamy wrote in post #19116579

IMAGE LINK: https://flic.kr/p/2jBc​tAi Back lit Mallard by A & R Photography, on Flickr

WOW!!!!!!!!!!!!!!!

jeffreybehr wrote in post #19116790
WOW!!!!!!!!!!!!!!!

I gotta say... I don't do birds, but that one really got my attention. I agree. Wow.

AcademicNomad wrote in post #19116740
Rob, you are rocking the 400mm lens on R5. It is making my 1dxiii/R5 decision very hard.

I just went through this and decided on the R5. Time will tell....

AcademicNomad wrote in post #19116740
Rob, you are rocking the 400mm lens on R5. It is making my 1dxiii/R5 decision very hard.

edmidlifecrisis wrote in post #19116818
I just went through this and decided on the R5. Time will tell....

If it helps with the decision I just came back from selling one of our 1dx Mark III's and Amy's 1dx Mark II today. The R5 is a great camera, at least for wildlife as that is the most I have done with it. The Af system is the best I have used.

jeffreybehr wrote in post #19116790
WOW!!!!!!!!!!!!!!!

Thank you

First time in a long time today i got to shoot this sport, it's been about six years since last time and back then i had a crappy old camera and lens. This time i shot with the R5 and electronic shutter. It felt like childs play to catch the moments. So easy i could probably have done in blindfolded.