Long focal length macro lenses are a really poor choice for field macro work unless you are using natural light as the light source. Wake me up when Canon releases an RF version of the MP-E 65mm macro lens. 99.9% of my single frame macro work has been taken with the EF version.
I've asked if anyone can point to any production lens specific design actually being first mentioned as an example in a patent application and no-one's pointed out a single case to me. I also haven't seen such a case myself. I'm sure it must happen from time to time but I'm still waiting for someone to point such a case out. Until we have a good record of many or even most new lenses being mentioned in patents as examples of their respected general architecture or designs, though, I think it'd be premature to hope that this particular design would be built.
How many examples would you like? I didn't bother going back too far.
Canon News has uncovered a patent for a Canon RF 100mm f/2.8L IS USM Macro 1:1.4x. A macro for the RF system is already long overdue and I expect that we'll sewww.canonrumors.com
Yesterday I posted a patent showing the optical formulas for both an RF 15-35mm f/4L and an RF 16-35mm f/4L. I noted that an RF 14-35mm f/4L is rumored to be cowww.canonrumors.com
The 50mm f/1.8 is a must lens for pretty much any manufacturer, and it's safe to say that Canon will be bringing this affordable prime lens to their RF mount.www.canonrumors.com
The 65mm macro is a fine lens for head shots at 1:1 or higher magnifications, but for butterflies, dragonflies, grasshoppers and most other insects that are encountered in the field, a longer focal length is usually preferable.My kit is mostly primes so 180mm is a very compelling focal length for a 1:1 or greater macro lens, imho.
…or shooting at high magnification. For example, shooting with the MP-E 65 at a diffraction-friendly f/11, the effective aperture at 5x is f/66. That’s why I use the twin-flash.Back in the days of film, when we were generally limited to ISO 100 slide films, most people used flash to enable a usable combination of small aperture and freezing movement, but from my observations, the vast majority of people nowadays prefer to shoot by ambient lighting, unless they are working indoors or in the darkness of a rainforest interior.