Sigma 105mm F/2.8 EX DG OS HSM with RF Adapter Compatibility.

[ApexNorth]

Hey everyone,

Just wandering if anyone has used this combo with the R7 or R8? I've checked the Sigma website and it looks to be compatible but I wanted to check because I've heard that some Sigma lenses have pulsing issues (Sigma 150-600).

I've taken a look at Canon's offering for macro lenses and I've not found anything long enough, I think the longest RF Macro Canon make is 85mm. I love the Sigma 105 because it's great value and with a great focal length which allows me get closer enough while staying far enough away to not startle insects.

Thanks,

Apex

 

[R2D2]

Hey everyone,

Just wandering if anyone has used this combo with the R7 or R8?

For macro the R7 wins hands down IMHO (being crop, and having IBIS).

I've checked the Sigma website and it looks to be compatible but I wanted to check because I've heard that some Sigma lenses have pulsing issues (Sigma 150-600).

That’s the only one that I’ve heard about doing that.

I've taken a look at Canon's offering for macro lenses and I've not found anything long enough, I think the longest RF Macro Canon make is 85mm. I love the Sigma 105 because it's great value and with a great focal length which allows me get closer enough while staying far enough away to not startle insects.

Canon’s 85/2 is only a 1:2 macro.

Have you considered Canon’s own RF 100mm f/2.8 1.4:1 macro? It autofocuses through the entire range, and with the increased “magnification” it is like shooting with a built-in 1.4x. It has excellent IS which works extremely well with IBIS (R7), and IQ is simply outstanding.

If it’s too much for your budget however, then the Canon EF 100mm f/2.8L (1:1) is also excellent.

R2

--
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Experience comes from bad judgment.
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[J.K.T.]

I've taken a look at Canon's offering for macro lenses and I've not found anything long enough, I think the longest RF Macro Canon make is 85mm.

I see you have missed the RF 100mm macro. The EF 100 L also works just fine with the adapter. Some of the Laowas are also good even though they are fully manual.

 

[ApexNorth]

Hey everyone,

Just wandering if anyone has used this combo with the R7 or R8?

For macro the R7 wins hands down IMHO (being crop, and having IBIS).

I've checked the Sigma website and it looks to be compatible but I wanted to check because I've heard that some Sigma lenses have pulsing issues (Sigma 150-600).

That’s the only one that I’ve heard about doing that.

I've taken a look at Canon's offering for macro lenses and I've not found anything long enough, I think the longest RF Macro Canon make is 85mm. I love the Sigma 105 because it's great value and with a great focal length which allows me get closer enough while staying far enough away to not startle insects.

Canon’s 85/2 is only a 1:2 macro.

Have you considered Canon’s own RF 100mm f/2.8 1.4:1 macro? It autofocuses through the entire range, and with the increased “magnification” it is like shooting with a built-in 1.4x. It has excellent IS which works extremely well with IBIS (R7), and IQ is simply outstanding.

If it’s too much for your budget however, then the Canon EF 100mm f/2.8L (1:1) is also excellent.

R2

I can actually get quite a good deal on this lens if I sold my Sigma. But I'd need to check if the autofocus is at least as fast as the Sigma (Which isn't fast) because as I said I do lots of insect macro and apparently the EF 100mm is quite slow with the adapter but I'd rather take that than have pulsing and hunting issues. The image quality from some of the images I've seen are really sharp.

Thank you for the info on the Canon 85/2 I did't realize that it was 1:2 which is NOT what I'm looking for. Need a 1:1.

Thanks R2, some really good info.

 

[mnk88]

I use that lens with my RP. I have the regular adaptor - not the one with the control ring. I originally picked the lens up for event shooting for the distance it offered, wide aperture, and OS. I had a 60D, and I found it matched the reviews well. Very nice sharpness, even wide open. Really similar in terms sharpness and IQ it's capable of to the Canon EF 100mm f2.8 L I used to own, but for much less $. As with other third party lenses I've owned, I found its AF accuracy to be less than the canon EF lenses I've used.

When I switched to mirrorless, I was really pleased to find its AF accuracy to be much improved. It seems as good as any of the Canon EF or RF lenses I currently shoot with. As in, it is accurate pretty much all the time. Really rare to get an OOF shot, unless I make a mistake. The only thing I can knock it for is the OS is not as consistently good on my RP as the IS was on my Canon 100mm L and 60D. I use another lens for events now (canon 135 f2), so I don't use the sigma much anymore. I have thought of selling it, but probably should keep it for macro work, where OS isn't that useful anyway.

On my RP, I had to turn off the in-camera lens aberration correction (peripheral illumination correction specifically I believe), otherwise I sometimes saw a dark circle around the edges of the screen while shooting. Pretty sure I never saw that it in the actual images taken, just the LCD. Nevertheless, turning off the auto setting eliminated that issue. I've done some macro focus stacks with it. Works great. The manual focus peaking works great as well. I can set the colour for in-focus areas, and clearly see what will be in focus to start a focus stack.



I am not familiar with the pulsing issue you speak of.

 

[ApexNorth]

I use that lens with my RP. I have the regular adaptor - not the one with the control ring. I originally picked the lens up for event shooting for the distance it offered, wide aperture, and OS. I had a 60D, and I found it matched the reviews well. Very nice sharpness, even wide open. Really similar in terms sharpness and IQ it's capable of to the Canon EF 100mm f2.8 L I used to own, but for much less $. As with other third party lenses I've owned, I found its AF accuracy to be less than the canon EF lenses I've used.

When I switched to mirrorless, I was really pleased to find its AF accuracy to be much improved. It seems as good as any of the Canon EF or RF lenses I currently shoot with. As in, it is accurate pretty much all the time. Really rare to get an OOF shot, unless I make a mistake. The only thing I can knock it for is the OS is not as consistently good on my RP as the IS was on my Canon 100mm L and 60D. I use another lens for events now (canon 135 f2), so I don't use the sigma much anymore. I have thought of selling it, but probably should keep it for macro work, where OS isn't that useful anyway.

On my RP, I had to turn off the in-camera lens aberration correction (peripheral illumination correction specifically I believe), otherwise I sometimes saw a dark circle around the edges of the screen while shooting. Pretty sure I never saw that it in the actual images taken, just the LCD. Nevertheless, turning off the auto setting eliminated that issue. I've done some macro focus stacks with it. Works great. The manual focus peaking works great as well. I can set the colour for in-focus areas, and clearly see what will be in focus to start a focus stack.



I am not familiar with the pulsing issue you speak of.

Nice photo!



Thanks, makes me feel a lot better about keeping my lens now. Looks like great image quality from the RP, I also plan to use the regular adapter and it's interesting that auto-focus has improved as I felt it's quite slow on my current DSLR.

 

[GammyKnee]

Can't speak for the R7/R8 but it performs faultlessly on my R and R6 with the no-frills Canon adapter. AF is fast (for a macro) and accurate.

 

[mnk88]

AF speed is pretty good. It acquires subjects quickly enough for me in all sorts of different lighting conditions, and I can confirm that eye AF works with this lens on the RP. I have occasionally observed it to struggle a bit on spot AF when there isn't enough contrast on the subject, but going to a larger AF area solves that. I have tried it for indoor sports, but it can't keep up in servo mode. Again, the only thing that disappoints me about it on my RP is the OS. In a series of shots using OS at about 1/125s, they'll all be properly focused on my target. However, I do see a difference in resolution comparing images. A few will have that biting sharpness that reminds me of the 100L I used to have, while the others fall below that standard. Just spit-balling here, but I wonder if the lack of a mirror affects the way the OS in the lens is programmed to behave?