Canon EF 40mm f/2.8 STM Information.

[Canon Rumors]

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Canon EF 40mm f/2.8 STM

Just discovered the new pancake is also part of the new “STM” family of lenses from Canon.  The lens is also extremely small with a thickness of 22.8mm and weighing in at 130 grams.

Below are a few more images of the lens in comparison to the EF 50 f/1.8 II.

Specifications

• Focal length / Aperture: 40mm / 1:2.8


• Lens Construction: 4 group 6 pieces


• Closest focusing distance: 0.3m


• The maximum magnification ratio: 0.18-fold


• Filter diameter: 52mm


• The maximum diameter: 68.2mm


• Length: 22.8mm


• Weight: About 130g


• Lens Hood: ES-52 (Not Included)

 

Canon EF 40mm f/2.8 STM

Canon EF 50 f/1.8 II compared to the Canon EF 40 f/2.8 STM

Lens Design of the Canon 40mm f/2.8 STM

[Etienne]

If it's sharp and contrasty at 2.8, then I'm in.

[trulandphoto]

I have never pre-ordered photo equipment. This lens will be my first.

[paul13walnut5]

+1 WAAAAAAAANT.  Been wanting for years!

[Harry Muff]

Forgive my ignorance, but what's special about this? It's only 10mm wider than the 50 and a stop slower. 

[mememe]

Forgive my ignorance, but what's special about this? It's only 10mm wider than the 50 and a stop slower. 

Its small!

[TrumpetPower!]

If you want a really good feel for what this will be like, lock together a body cap and a rear lens cap and hold them flush against the lens mount of your camera.

Indeed, if it's really under $200, I can easily see it becoming a popular choice for a replacement body cap! think about it...you can either cap the body with a bulky lens (even the Plastic Fantastic is awkward as a body cap), a functionless piece of plastic, or an actual lens that's right about at the textbook "normal" focal length for full frame.

I'll personally wait for some lens reviews...but if the IQ wide open doesn't suck, I can easily see getting at least one per body.

b&

[phemark]

I need a physics lesson:

Why cant they put bigger glass in it, and make it pancake size 40mm F0.5 or similar?

[mememe]

I need a physics lesson:

Why cant they put bigger glass in it, and make it pancake size 40mm F0.5 or similar?

I guess bigger glass means longer Lens

[dswatson83]

Please canon, stop with these lenses that don't make sense. How many people called Canon to complain that the 50mm f/1.8 or 35mm f/2 were too big and heavy. Seriously, how about addressing the ACTUAL problems. In 22 years, you can't make an improved 35mm f/2 with better focusing and a sharper image? Instead you shrink the 50mm f/1.8 for $100 more & make it 1 stop slower? Who is approving these lenses. Canon, you tell me you can't fit IS in a 24-70mm f/2.8 and then Tamron does it. Rather than improving the 2+ decade old fast primes like the 50mm f/1.4, 28mm f/1.8 & 35mm f/2 that almost every photographer who doesn't have the L versions use (and all of those lenses could be better), you put IS in f/2.8 primes??. The primes we all love are all 2-3 decades old! Please Canon, improve them and stop wasting your time on stupid designs of lenses no one asked for.

[Harry Muff]

$200 to replace the plastic caps? No thanks.

[preppyak]

Forgive my ignorance, but what's special about this? It's only 10mm wider than the 50 and a stop slower. 

The STM would, presumably, make the auto-focus during video very quiet. NOW this lens makes sense. The 18-135 covers your general video use, but for someone who wants lower-light handling while shooting video (but still AF), they could use this. Whereas the AF for the 35mm f/2 and 50mm f/1.8 are loud and will destroy your audio.

Still makes it a silly lens, but, at least it makes sense

[phemark]

I need a physics lesson:

Why cant they put bigger glass in it, and make it pancake size 40mm F0.5 or similar?

I guess bigger glass means longer Lens

But why it has to be longer? Cant they bend light sharply enough to use big glass in a very short lens? What are physics restrictions to this? (Just curious , an article regarding this would be an interesting read)

[Stevo2008]

Forgive my ignorance, but what's special about this? It's only 10mm wider than the 50 and a stop slower. 

Three things better than 50mm 1.8:
-  Full time manual focus
- Quiet autofocus
- 7 circular blades =  great bokeh!

This will be my first pre-order of any canon (2nd of all electronics - 1st was iPad).

[dswatson83]

Forgive my ignorance, but what's special about this? It's only 10mm wider than the 50 and a stop slower. 

Its small!

The 50mm f/1.8 & 35mm f/2 are super light and hardly stick out past the grip, are smaller in diameter than the camera, and are a stop faster. What is the point of making it smaller than the grip? Is there really a Canon DSLR owner out there that is pissed because the 50mm f/1.8 & 35mm f/2 are just too large and heavy?