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Return of the Crop King, but only for RF? (Sigma 17-40 f1.8)


Al Dolega
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https://www.canonrumors.com/canon-aps-c-shooters-rejoice-sigma-to-launch-the-rf-17-40mm-f-1-8-and-rf-12mm-f-1-4/

Remember those like 5 years where everyone had the 18-35mm f1.8? Seems like this would be the successor.

Full frame is of course dominant now, so this wouldn't be as omnipresent as the 18-35, but could still be a very popular choice, at least if it comes to other mounts too.

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EOSHD Pro Color 5 for Sony cameras EOSHD Z LOG for Nikon CamerasEOSHD C-LOG and Film Profiles for All Canon DSLRs

Really great focal range for me, but I don’t have any APSC cameras.

Interesting though…especially if I do move over to Sony next year because on an FX30 body, that would be a very neat pairing for my needs…

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6 hours ago, Al Dolega said:

I would assume Z too?

No Z for now. Sigma is not much interested to work with Nikon, for whatever reason. 

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Not sure what the situation is with Sigma and the Z mount.

They do three of their fast compact APS-C primes in Z mount but not the zooms or full frame.

They do more in RF mount but, again, no full frame.

You could speculate that pressure from both their L mount partners and their sensor supplier keeps them out of supplying the big two with full frame lenses.

In the case of Nikon it’s a bit moot as with the Megadap you can just buy the e-mount versions anyway and have them as near as dammit native anyway.

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Curious about the size of 17-40mm 1.8, if it is still similar to 18-35mm I think the FF 28-70/24-60 2.8 will be a better choice for smaller size/weight.

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I will probably add this one to come now when I have a 16-300mm f/3.5-6.7 [tiptop AF & breathing as well 6-stops @16mm & 4.5-stops @300mm stabilization performance*] for day light, paid last Thursday and scheduled to just arrive by this June 2...

*These tests serve as example why new releases can bring a whole difference working out as useful add-on to your arsenal... A bit more of love spread wherever fits wouldn't hurt ; ) No use of primes match the resource of zoom lenses and how handy they are. Fast glass is not everything in life, even though their blesses I also stand as irresistible indeed. Go figure to couple a lightweight zoom range like this one is.

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  • 3 weeks later...
On 5/31/2025 at 10:26 PM, Emanuel said:

No use of primes match the resource of zoom lenses and how handy they are

There’s a truth in that and every time I try a prime again, it’s pretty much straight back to a zoom.

I recently invested in a set of Panny L Mount f1.8 primes and though I like the 50, the 18 is just too wide and I’m just not using the 85.

So it’s back to the 28-70 f2.8, probably keeping the 50 as I do need something as I have ‘stolen’ back the 28-70 from one of my statics.

The 18 and 85 I reckon I just need to sell but most likely trade for the Sigma 28-45mm f1.8 because for indoor work and my needs, I can’t see past it.

I did look at this new 17-40, but no dice as I’m not going back to 4k crop when for the last 2 years, I’ve been shooting full frame 6k open gate.

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  • 3 weeks later...
  • 4 months later...
On 6/19/2025 at 7:47 PM, MrSMW said:

 

I did look at this new 17-40, but no dice as I’m not going back to 4k crop when for the last 2 years, I’ve been shooting full frame 6k open gate

U-turn, - would not be the first time in my life and won’t be the last…

Ordered and arriving Tuesday as my new principal video lens. On an S1RII.

Why?

Simple, - the only way I can make a 3 camera (over a 4 camera) system work, is with zooms.

And although I keep considering it out of need over choice, anything over around 700/750g is just larger and heavier than I’d like and really, ideally no more than 500g.

As much as I love the Sigma 28-45mm f1.8, it’s a bit big and heavy and slightly limited, even if engaging hybrid zoom crop mode making it more like a 28-70mm (hybrid zoom = x1.4 and engaging standard digital IS = x1.1). It’s a 1kg chunk of glass and isn’t that stable on a freestanding monopod.

I have the Sigma 28-70mm f2.8 and that’s been a workhorse and remains so for me, but is now welded to my other S1RII for stills duty, again with hybrid zoom mode making it more like a 28-100mm but without that last bit of compression a 28-105 might have.

There is the recent Lumix 24-60mm f2.8 full frame lens and it was an option, but I like the crop option f1.8 from Sigma with its internal zoom.

On the S1RII, it offers 4.7k 50/60p in 17:9 and with standard EIS engaged, a useful range of 28-66mm is full-frame terms.

Anyway, that is the plan subject to testing it out over the next couple of weeks and if it doesn’t work out as expected, the Lumix 24-60 could be an option, but it’s the more modern reincarnation of the old 18-35 f1.8 but with more range and vastly better AF.

Keeping my Lumix 18mm f1.8 to slap on for those few but essential occasions where I do need more width than 28mm for video and the 35mm f1.8 for better low light capability for stills, but the 50mm is basically redundant and the 85, dunno, undecided…

I ended up using the 85 a lot more for video than expected the second half of my last season just gone, but about 15mm too long most of the time so probably also going…

So going forward I can dedicate one unit to stills, one to roaming video and the third to static video and as a one man band, I don’t think there is a better option for my needs.

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