Canon Looking At a Canon 18mm f/1.4 VCM?
- By DocInfoSci
- Patents
- 37 Replies
I have yet to see the slaughter with my own eyes, but I'll compare when I get the chance to properly play with the RF 24 based on your comment! Not that I have ever — I mean ever — complained about my 24mm quality outside of astro. But I believe you when you suggest you have.you aren't seriously comparing the EF 24mm f1.4 vs the RF 24mm f1.4 and completely ignoring the fact that the RF 24mm takes the EF version out to the woodshed in terms of image quality?
mechnical linking with no power on is a weird hill to die on when the entire view finder optical path for mirrorless.. requires power.
To be fair, I was comparing the EF 24mm 1.4 ii with the EF 24-70 4 IS and noting the effect on scene inclusion due to the digital corrections. I have assumed that the larger exit on the prime has much to do with this outcome. Physics being what it is, I assume the same issues in the RF line when optics are compared. I suspect that the RF "glass" performance is really more about other factors such as the shorter distance from exit to sensor, improved IS, etc. and had the EF lines continued the glass would otherwise have been as good anyhow. I mean, look at where the big whites landed, or the 11-24 — it seems "glass" of itself had been figured out.
By the way, have you compared the amount of scene included in the final images between the EF 24 and the RF 24? Just curious. Is the same amount of view captured after digital corrections, or is one getting shorted? If the EF is getting shorted then that would be astounding and say a lot about the progress of Canon's lens element engineering capabilities in a short period of time.
It also occurs to me that if Canon makes the exit optics in such a way that the projected image covers the sensor then the same effect as the larger glass in previous iterations is probably achieved. I don't recall anyone looking at and remarking the projected image size. I'm curious.
I think I was simply turned off to the RF way of MTF by the initial one-shot limited MTF, or the need for a switch, or the need for a menu config, or the fact that still not all RF lenses can yet MTF with servo on a whim. The power thing just makes it all the more obvious. MTF in my approach is important, and I really like servo. I'm aware from an earlier discussion that I need to rent / borrow some modern RF lenses and try again.
I do also like the tactile feel of the mechanical linking. As a person who sometimes has the luxury of enjoying the experience that includes focusing just right it's nice to have the slight resistance, give, etc. when focusing. My EF 40 STM just feels... disconnected... when focusing; the exact focus achieved doesn't totally line up with the human input. It's subtle, but it is there. So it has been thus for the earlier RF lenses that I tried. It's a meh feel. Cheap even, which is ironic. Perhaps Canon has made it much better? I just haven't been bothered to check lately.
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