Canon launched the VCM line of hybrid lenses with the RF 35mm f/1.4L VCM in June of 2024, and since then, they have added five more lenses to the series. We have reported in the past that Canon would be adding one more lens to the series with a longer focal length than the 85mm […]

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I just bought the RF 135 f/1.8 on the current refurbished sale.

So, you know, paving the way for Canon to announce something like this....or the 50-150 (or 135) f/2 I've wanted.

All of the VCM primes have a 67mm filter thread. Keeping those dimensions with a 105/1.4 is not possible, it would need at least a 77mm filter thread. A 105/1.7 or 135/2.2 could work though.

You can get around this with a design closer to 100 and f/1.5. Very few lenses are the marketing focal length and there are f/1.4 lenses that are actually f/1.5. Exposure isn't really going to be affected (Camera software can deal with this too). Not all the VCM lenses are exactly the same size, but you could squeeze a 67mm filter on a "105".

The 85 VCM is more like 81mm and f/1.48.

No one notices 50mm lenses that are 46mm or 54mm. The 45 1.2 is 49mm I think (Marketing made it 45mm to avoid consumer confusion).

I own the 14mm, 20mm, 50mm, and 85mm from the series

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That would be my absolute dream line-up for VCM lenses!
I currently own the 50mm and I absolutely love it!

All of the VCM primes have a 67mm filter thread. Keeping those dimensions with a 105/1.4 is not possible, it would need at least a 77mm filter thread. A 105/1.7 or 135/2.2 could work though.

105/1,55 would work exactly. Canon marketing would make it a f1.4 lens.

Absolutely!
Why care about stupid filter size when buying such expensive lenses?
Compromising optical quality in order to save a few euros/$ on filters?
This lens has to be as good as the 135mm. This is what matters!
And yes, I know, many (!!!) American AMG customers try to save a few bucks buy regular fuel for their expensive 6 or 8 cylinder coupes. Plain stupid!
Just like buying an R1 and the CF Express cards from ali express...

You miss the point here. Mat boxes, filters, follow focus etc of uniform size make production kits convenient. To many in the real world this is very important.

I understand, but you just cannot squeeze an RF 105mm f/1,4 into a standard filter size, if vignetting suffers from it.
Anyway, even for other lenses, I still believe optical quality should always be the priority, and not filter size.

Yes, you can if the market wants it. It seems to me that Canon is making the VCM lenses for the day to day businesses that appreciate the size and uniformity. The image quality is just fine for them and to many many others. Canon also sems to have another set of lenses (often with f1.2) for people like you.

I understand, but you just cannot squeeze an RF 105mm f/1,4 into a standard filter size, if vignetting suffers from it.
Anyway, even for other lenses, I still believe optical quality should always be the priority, and not filter size.

So why not crop a 24?

RF 50mm f1,2 II and RF 85mm f1,2 II would be two great new updates.

RF 200mm f1,8 or f2,0 would be the holy grail for me.

"Please don't make any major buying decisions until we know anything for sure"...followed by a list of current VCM lenses with affiliate buy links.