Ive been shooting with the R5 for about three years now and honestly I love the thing for landscape work, but lately Ive been getting really into macro photography and my current setup is just failing me hard. I tried using extension tubes on my 24-70mm but the sharpness at the edges is totally falling apart and the focus breathing is driving me crazy when Im trying to stack shots in the field. I need a dedicated prime lens because the results I see from other people online are just on another level. I have a shoot coming up in three weeks where I need to document some really tiny flower details and insect anatomy in my backyard here in Oregon and the light is usually pretty tricky, so I need something that handles contrast well.
Im looking for something that fits these constraints:
- Needs to be RF mount because I dont want to mess with the EF adapter anymore, honestly tired of the extra weight and bulk.
- Budget is around 1200 bucks max, maybe a little more if the used market has something solid.
- Minimum 1:1 magnification ratio is a hard requirement because I want to get those compound eye shots.
- Auto focus speed matters a bit because sometimes I do handheld stuff, though I know manual is usually the go-to for macro.
Should I just bite the bullet and go for the RF 100mm f/2.8L Macro IS USM? I know its pricey but that spherical aberration control feature seems like it might be cool for portraits too. Or am I better off looking at a third-party option if there even is one yet that works well with the R5 sensor? My main worry is losing that crispness the R5 sensor gives me if I settle for a cheaper lens. Has anyone used the 100mm L on a high-res body like the R5 and noticed issues with diffraction or is it basically perfect? Pretty frustrated with my current shots looking soft...
Had a moment to think about your situation. If you are chasing those compound eye shots on an R5, the Canon RF 100mm f/2.8L Macro IS USM is essentially the gold standard for native RF. The spherical aberration control is definitely a neat parlor trick for portraits, but for pure macro work, the image stabilization and sharpness are what you are actually paying for. I have shot extensively with it and the resolving power handles that 45MP sensor no problem, so no worries about diffraction unless you are stopping down past f/11. Quick question tho, are you planning on using a tripod for your stack, or are you strictly handheld? Because if you are doing mostly handheld, the focus breathing on that lens might actually annoy you more than you think. Have you considered looking into the Laowa 100mm f/2.8 2X Ultra Macro APO for RF mount? It is manual focus only, which is fine for macro, but the 2:1 magnification is a total game changer.
> I have a shoot coming up in three weeks where I need to document some really tiny flower details and insect anatomy Honestly, if you have a deadline that tight, dont gamble on third-party manual glass. I tried the Laowa 100mm f/2.8 2X Ultra Macro APO on my R5 and while the 2:1 magnification is insane, the lack of native autofocus for handheld insect work made me miss so many shots I almost threw it in the river. You really need that speed. The RF 100mm L is sharp enough to cut glass, but watch your aperture. Since you are using the R5, just dont push past f/8 or f/11 if you want to avoid diffraction softening your results. Also, get a good ring light or flash setup. Macro needs light and you wont get that sharp anatomy without it.
Honestly, stop messing around with extension tubes if you want to get serious about insect anatomy. I have spent years shooting with high-res sensors and the moment you start pushing glass beyond its intended design, those corners turn into mush. You are absolutely right to move to a dedicated prime. The R5 is unforgiving and will expose any flaws in your glass instantly. In my experience, here is what you need to keep in mind for your upcoming shoot:
- Forget about third-party options for now if you really want that native RF communication and stabilization to work seamlessly with your sensor.
- Watch your shutter speeds closely because at 1:1, even the tiniest vibration on that high-res sensor ruins everything.
- Stop worrying about diffraction at the levels you are talking about; just keep your aperture within the sweet spot and use a solid tripod or a good flash setup for those tiny details. If you go for the top-tier glass, you wont regret it. It is built to resolve enough detail to make your jaw drop, even on the R5. The spherical aberration control is a nice bonus for portraits, sure, but the real magic is the contrast and the way it handles fringing in those tricky outdoor lighting conditions. Just get the native lens and master your lighting. Once you get that crispness, you will never look back.