- Posts: 26
- Joined: Thu Mar 19, 2015 12:04 am
Hi.
I can`t decide between the "Sigma 17-50mm 2.8 + Blackmagic Speedbooster" and the "Panasonic 12-35mm f.2.8"
I was wondering if someone had any experience with both lens and could give me some advice.
In Theory with the Sigma i would get around 10-29mm with Speedbooster (0.58 wider).
Its a bit wider then the Panasonic but not a huge difference i guess.
If I am right the Sigma Image Stabilization and autofocus should work with the "Bmpcc Speedbooster Canon mount" as its an active mount. Is that correct?
The extra Speedbooster f-stop would give me around f.2.0 if that is correct as well?
From what I understood is that even with the extra f-stop i won`t get a shallower depth of field but more light in low light condition.
So basically when shooting Panasonic in f2.8 and Sigma f2.0(extra Speedbooster f-stop), i would get the same depth of field? So with the speedboost I won`t profit from a shallower depth of field at all?
Also, i have heard at a lower focal length gh4 or gh5 user will get a strong vignette effect with the sigma lens. Does anyone know if that will happen with the bmpcc as well?
Thanks
Jan
I can`t decide between the "Sigma 17-50mm 2.8 + Blackmagic Speedbooster" and the "Panasonic 12-35mm f.2.8"
I was wondering if someone had any experience with both lens and could give me some advice.
In Theory with the Sigma i would get around 10-29mm with Speedbooster (0.58 wider).
Its a bit wider then the Panasonic but not a huge difference i guess.
If I am right the Sigma Image Stabilization and autofocus should work with the "Bmpcc Speedbooster Canon mount" as its an active mount. Is that correct?
The extra Speedbooster f-stop would give me around f.2.0 if that is correct as well?
From what I understood is that even with the extra f-stop i won`t get a shallower depth of field but more light in low light condition.
So basically when shooting Panasonic in f2.8 and Sigma f2.0(extra Speedbooster f-stop), i would get the same depth of field? So with the speedboost I won`t profit from a shallower depth of field at all?
Also, i have heard at a lower focal length gh4 or gh5 user will get a strong vignette effect with the sigma lens. Does anyone know if that will happen with the bmpcc as well?
Thanks
Jan
Last edited by Jan Schubert on Wed Mar 21, 2018 3:42 pm, edited 2 times in total.