Canon RF 50mm f/1.8 STM specifications

Canon Rumors Guy

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Here are the full specifications for the Canon RF 50mm f/1.8, I expect this lens to be announced later tonight.
Canon RF 50mm f/1.8 STM:

6 elements in 5 groups
Minimum focusing distance: 0.3m /  11.8″
Maximum magnification: 0.25x
7 aperture blades
43mm filter thread
Size: 69.2mm / 2.72″ x 40.5mm / 1.59″
Weight: 160g / 0.35lbs
Price: $199 USD



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Interesting stuff. Let me complain, but still be happy (i.e. price): filter thread is odd size, # of apeture blades is lacking but 7 is better than 5 (...), and cool they have moved away from double gauss lens design (right, or is it just -- different..?). It will likely be my first RF lens for my EOS R (still anxious about selling my EF lenses..!).
 
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1:4 max. reproduction ratio converts to 95 x 144 mm image field which is a post card sized object: Fine!
I expect a quality similar to the EF 2.8 40mm (both have one aspherical element which helps a lot wide open and in the 50mm range) and great flare resistance/contrast in contralight due to the low lens element/group count: Fine!

I will use the RF 35 due to its better 1:2 macro and the built in IS but if I wouldn't own it I would buy it without hesitation!
EDIT: And if I find out that this lens is better suited to film lessons from a tripod than 35mm I will buy this one which will well perform AF with DPAF and STM.
 
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Interesting stuff. Let me complain, but still be happy (i.e. price): filter thread is odd size, [...]

Same filter thread size like EF-M 32 and EF-M 22 - is there any chance for a convergence between RF and M camera line (with a dual flange distance mount however this will be realized)?
 
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jolyonralph

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Interesting stuff. Let me complain, but still be happy (i.e. price): filter thread is odd size, # of apeture blades is lacking but 7 is better than 5 (...), and cool they have moved away from double gauss lens design (right, or is it just -- different..?). It will likely be my first RF lens for my EOS R (still anxious about selling my EF lenses..!).


No it's a pure simple double-gauss design. So it's pretty much identical in capabilities to the EF 50mm STM. Slightly better macro (0.3m MFD vs 0.35m = 0.25x instead of 0.21), same number of diaphragm blades, and same weight.
 
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Besisika

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Sorry for being late in the thread but does this come with a hood? Even an additional cost might interest me. I own the pancake and it is a pain to use it outdoor or near a window light. Third party hoods don't always deliver. The price is really fantastic for the time I need a 50mm, and if a native hood is available, I am all for it.
 
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Dmcavoy

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Nov 20, 2019
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Sorry for being late in the thread but does this come with a hood? Even an additional cost might interest me. I own the pancake and it is a pain to use it outdoor or near a window light. Third party hoods don't always deliver. The price is really fantastic for the time I need a 50mm, and if a native hood is available, I am all for it.
Only L series lenses come with hoods.
 
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usern4cr

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Wow - only $199 - that'll sell a lot of lenses, and help some people wanting to jump into the R mount system.

It's not a lens for me, as I'd prefer a 50mm f1.4L which would have great IQ & build at a more moderate size & weight than the f1.2L. But anything that helps Canon with its market share and balance sheet is good news for everyone in the R mount system.
 
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Sporgon

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Interesting stuff. Let me complain, but still be happy (i.e. price): filter thread is odd size, # of apeture blades is lacking but 7 is better than 5 (...), and cool they have moved away from double gauss lens design (right, or is it just -- different..?). It will likely be my first RF lens for my EOS R (still anxious about selling my EF lenses..!).
No it is a double gauss formula and appears to be very similar to that used in the 1964 Canonet rangefinder camera where a similar optical formula appeared as a 45mm f/1.7 lens. The fifth element is aspherical in the new version. (As opposed to the other Fifth Element which was a rather lovely Milla Jovovich.
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I don't know what reputation this camera had as far as IQ goes, but I do remember that the simple double gauss 5 element 5 groups 40mm f/1.9 in the 1981 Canon Sure Shot AF35ML was very sharp indeed. In fact annoyingly so; it was better than my Nikkor lenses at the time.
 
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