Field of View Sigma 18-35? Gh4 combo?

M

M1CEtro

Active member
I've read varying posts on the internet and I'm a bit confused about this lens.

I recently switched from my full frame 5d Mark 3 to the MFT gh4. So when a canon lens tells me 24-105mm and i put it on my full frame 5d, I'm used to seeing the actual Field of View of 24-105mm.

Now that I'm shooting with the gh4, I know there's a crop factor. But if I use a metabones canon ef to mft adapter with the .64x wider view. From what I understand, this will negate the crop factor of the gh4.

With this combo, I'm pursuing a wide zoom lens.
I'm contemplating Sigma 18-35mm 1.8 vs Tokina 16-28 2.8
From what I read, the sigma lens is very good but it is designed for aps-c sensors.

Questions
1. If I put this 18-35mm on my gh4 w/ metabones combo, will my FOV actually be 18-35mm or something else? If something else, what?
2. Will the 18-35mm function on other sensor size cameras such as S35 and full frame with canon ef mount?
3. If so, does the fact that it's aps-c affect push in the FOV on those cameras too?

Thanks

Roger
 
1. With the speedbooster XL the FOV of the Sigma 18-35mm wiil be 27mm-52.5mm when shooting in 4K (1.5 crop). FOV will be 23mm-45mm in HD mode and will vignette because you are pushing beyond the image circle of the lens.
2. The Sigma will work on S35 which is basically the same as APS-C, it will not work on full frame cameras because again you are pushing beyond the imaging circle of the lens.
3. You must add the crop factor to any lens when using on anything other than full frame. Even MFT lenses, such as the Panasonic 12-35mm you add the crop factor of 2x (HD) or 2.34x (4K) so essentially you are getting the FOV of 24-70mm or 28mm-82mm as compared to full frame equivalent.
 
M1CEtro said:
I've read varying posts on the internet and I'm a bit confused about this lens.

I recently switched from my full frame 5d Mark 3 to the MFT gh4. So when a canon lens tells me 24-105mm and i put it on my full frame 5d, I'm used to seeing the actual Field of View of 24-105mm.

Now that I'm shooting with the gh4, I know there's a crop factor. But if I use a metabones canon ef to mft adapter with the .64x wider view. From what I understand, this will negate the crop factor of the gh4.

With this combo, I'm pursuing a wide zoom lens.
I'm contemplating Sigma 18-35mm 1.8 vs Tokina 16-28 2.8
From what I read, the sigma lens is very good but it is designed for aps-c sensors.

Questions
1. If I put this 18-35mm on my gh4 w/ metabones combo, will my FOV actually be 18-35mm or something else? If something else, what?
2. Will the 18-35mm function on other sensor size cameras such as S35 and full frame with canon ef mount?
3. If so, does the fact that it's aps-c affect push in the FOV on those cameras too?

Thanks

Roger
Click to expand...

-FullFrame is 1x crop. No crop.

-APS-C and S35 is 1.5x crop

-GH4 without SB is 2.3x crop

-GH4 with 0.68x SB is 1.5x crop (s35/aps-c exactly)


So, the canon 24-105mm when put on a GH4 + SB will act like a 36-160mm lens on FF.

The Sigma 18-35mm will act like a 27-50mm lens FF. And that specific Sigma cannot be used on a FF sensor as it does not cover it and will not give you the FOV of 18mm on FF, just 27mm.

Want wider, the Tokina 11-16 on a GH4+SB act like a 16-24mm lens on FF.

I hope it's clear.

GH4+the GH4SB = APS-C/s35, as on 550d/7d/fs7/alexa/reds/f5-55/nx1/fs100/fs700/d7000/d5300 etc, not Fullframe like the 5D/A7s

I hope that's clear.
 
Ebrahim Saadawi said:
-FullFrame is 1x crop. No crop.

-APS-C and S35 is 1.5x crop

-GH4 without SB is 2.3x crop

-GH4 with 0.68x SB is 1.5x crop (s35/aps-c exactly)


So, the canon 24-105mm when put on a GH4 + SB will act like a 36-160mm lens on FF.

The Sigma 18-35mm will act like a 27-50mm lens FF. And that specific Sigma cannot be used on a FF sensor as it does not cover it and will not give you the FOV of 18mm on FF, just 27mm.

Want wider, the Tokina 11-16 on a GH4+SB act like a 16-24mm lens on FF.

I hope it's clear.

GH4+the GH4SB = APS-C/s35, as on 550d/7d/fs7/alexa/reds/f5-55/nx1/fs100/fs700/d7000/d5300 etc, not Fullframe like the 5D/A7s

I hope that's clear.
Click to expand...

Awesome reply. This helped alot. Thanks!
 
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