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3 hours ago, jonpais said:

I’m curious - how does using a follow focus with this lens increase the short focus throw?

Think of it like a lever. With a follow focus, you will gain rotation on the follow focus wheel, so it will be a little easier to get critical focus.

I actually think the Sigma 17-50mm lens is underrated. The OIS isn’t horrible, definitely helpful. It’s a fairly sharp lens and it has hard stops, so it’s definitely a good contender for a follow focus.

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I’d agree that the Sigma 17-50m is a decent choice for the P4K. With a speedbooster, you have a general purpose lens that mimicks a 24-70mm but with an f/2. Add the original 30mm 1.4 and you have a good two lens set up.

A better option may be the Canon 17-55mm f/2.8 and the 35mm f/2. Both have really good IS and with the speedbooster, you’ll have an f/2 and f/1.4 respectively.

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8 minutes ago, mercer said:

I’d agree that the Sigma 17-50m is a decent choice for the P4K. With a speedbooster, you have a general purpose lens that mimicks a 24-70mm but with an f/2. Add the original 30mm 1.4 and you have a good two lens set up.

A better option may be the Canon 17-55mm f/2.8 and the 35mm f/2. Both have really good IS and with the speedbooster, you’ll have an f/2 and f/1.4 respectively.

The problem is the canon's focus ring  doesn't have hard stops, right?

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7 minutes ago, Álex Montoya said:

The problem is the canon's focus ring  doesn't have hard stops, right?

Well, I only briefly owned the 17-55mm a few years ago so I don’t remember to be honest. The 35mm f/2 has them but I would call them soft stops. Basically, you can feel a stop on either end but the rubber grip continues to spin so it also can feel like there isn’t a stop if you’re not paying attention.

But with a lot of follow focus’, you can set hard stops. With my current setup, I’m not using a follow focus so I don’t have a lot of information about which products have that feature.

And I actually like a short focus throw. I focus by hand and like the tactile feel. With a long focus throw, it makes for some sloppy rack focuses. 

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2 minutes ago, mercer said:

Well, I only briefly owned the 17-55mm a few years ago so I don’t remember to be honest. The 35mm f/2 has them but I would call them soft stops. Basically, you can feel a stop on either end but the rubber grip continues to spin so it also can feel like there isn’t a stop if you’re not paying attention.

But with a lot of follow focus’, you can set hard stops. With my current setup, I’m not using a follow focus so I don’t have a lot of information about which products have that feature.

Ok, thanks a lot. I have a shooting coming in november and am looking for convenient alternatives. As for now, we're probably going to rent a set of Veydras.  

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2 minutes ago, jagnje said:

The Canon 17-55 is an ef-s lens. It will psysicaly not fit on the metabones speedboster unles you literally hack it. Don`t know about other adapters.

Don’t you just have to unscrew the back guard/fin and remove it?

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54 minutes ago, mercer said:

Don’t you just have to unscrew the back guard/fin and remove it?

I took a hacksaw to an ef-s lens that I got cheap to fit on a speedbooster. 

The performance of the lens was so crap though that I might as well have sawn both ends off it.

 

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Shrug, I like my GH5, Metabones Speedbooster 0.64XL, and either 18-35 Sigma Art, or Tokina 11-16.

Both lens work great, yes, there is some vignetting on the wider ends, I just zoom until I find it acceptable.

Not hard to do, though, those follow focus rings would be nice to have, I will have pick some up.

I want to try a Sigma Art 11-24 FF lens, no doubt I will probably get one...

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13 minutes ago, buggz said:

Shrug, I like my GH5, Metabones Speedbooster 0.64XL, and either 18-35 Sigma Art, or Tokina 11-16.

Both lens work great, yes, there is some vignetting on the wider ends, I just zoom until I find it acceptable.

Not hard to do, though, those follow focus rings would be nice to have, I will have pick some up.

I want to try a Sigma Art 11-24 FF lens, no doubt I will probably get one...

12-24 f4?

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1 hour ago, mercer said:

Don’t you just have to unscrew the back guard/fin and remove it?

the back fin also keeps the connections in place, so you need to saw a bit off. I did it the other day on the 10-20mm. I use it with the Viltrox EF-M2 and it's crazy wide. 

Strangely though, I can only zoom out to 11ish mm as I guess the glass in the lens hits a part of the booster at that point.

I think it even hits the glass in the booster, so keep that in mind if you plan on doing something similar. 

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2 hours ago, mercer said:

Don’t you just have to unscrew the back guard/fin and remove it?

I have the ef-s 17-55mm and you can just pull the back part off with your fingers, no need to unscrew anything. You do need to use some force but it seems safe to do - I think it's different to newer ef-s lenses where you do have to use a hacksaw. With that part removed, it should be fine to use on a speedbooster. The focus ring on this lens has soft stops, it's nice to use - with a slightly longer focus throw than the Tamron or Sigma equivalents. The stabilisation is only 3 stops but it's very smooth for video - it doesn't jump around abruptly like some Tamron lenses or Lumix lenses seem to do when panning. The build quality isn't that great unfortunately, it feels a bit fragile considering how much it weighs.

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