Orsonneke wrote:
I have 2 systems in use : apsc xt4 fujifilm and Fullframe Sony a7 R4 (61 Mpx)
I would like to buy a 2:1 macro lens from Laowa.
What would be the best option : 65 / 2.8 for Fuji knowing that the smaller sensor gives me more depth of field.
At the same magnification, Fstop, and focal length you get the same depth of field with every macro lens at 1:1 mag (and the sensor makes no difference). You can fill the frame with the subject at lower magnifications using a crop factor sensor, and the lower mag is what gives you the increase in depth of field and not the size of the sensor.
Note: Cropping an image, either with a smaller than full frame sensor or in post, creates an enlargement of the subject but does not change the magnification. It is called a "crop factor" because that is all it is, a crop. It is not a "magnify every aspect of photography factor"...
Or the 100 /2.8 for the full frame where I can enjoy the higher megapixel (more crop possible)?
Please could anyone advise?
IMHO it really depends on the light source you want to use. The 65mm would be a better choice for flash based macro since you need to get the light as close to the subject as possible to get soft light. But I think the Laowa 100mm above 1x has a short enough working distance for flash work.
A lens greater than 100mm would be better for natural light work cause the extra working distance comes in handy. Less likely to bump into something and spook the subject, or cast a shadow over it.
For flash based macro I use Canon's MP-E 65mm cause I like to just dial in the mag and the short working distance works in my favor for getting good light from my flash.
Tech Specs: Canon 80D (F14, 1/160, ISO 100) + a Canon MP-E 65mm macro lens (set to over 3x) + a diffused MT26EX-RT with a Kaiser adjustable flash shoe on the "A" head (the key), E-TTL metering, -1 FEC). This is a single, uncropped, frame taken hand held. In post I used Topaz Sharpen AI and Clarity in that order. I used an artificial flower to keep the background from being black.
For closeups I like using much longer glass, and shooting when the critters are hyperactive.
Tech Specs: Canon 80D (aperture priority F8, 1/800, ISO 800) + a Canon 100-400mm f/4.5-5.6L IS II with IS on. E-TTL metering, (-2/3 EV). This is a single, uncropped, frame taken hand held. In post I used Topaz Sharpen AI and Clarity in that order.
So lens choice really boils down to what you want to photograph and how you want to light the scene, and has nothing to do with the size of the sensor in your camera.