- Posts: 558
- Joined: Wed Jan 16, 2013 12:36 am
- Location: Seattle
Use 77mm or 82mm filters on your Sigma 8-16
Sorry I don't have any photos yet, but this process is pretty straight forward.
1) Purchase some Schedule 40 4" PVC pipe
2) Cut about 1/2" off of the end
3) Attach an 86->82mm STEP DOWN ring to the end of the PVC pipe using some gorilla tape around the edges.
4) At this point, the PVC pipe is too wide of a diameter to fit properly over the sigma lens. Two options:
a) Buy a new sigma lens cap, cut it, and attach the pipe to it. I have the lens cap but haven't gone this route yet.
b) Add some padding to the inside of the PVC so that it fits snugly over the sigma lens. I used two layers of 3M Heavy Duty mounting tape, leaving the red plastic backing on. It is a perfect fit.
5)
If you have an 82mm filter, you can attach this to the bracket and then mount it on your lens. Although I haven't tried, I suspect that you can do a full 8mm with an 82mm filter.
Otherwise purchase a 82mm->77mm STEP DOWN ring. Then use 77mm filters.
You will get some vignetting with 77mm filters at 8mm. If you are shooting 2.4:1 then it is not a problem. Otherwise you need to zoom to approximately 9.5mm to completely clear up the vignetting.
Hope this helps people filter their 8-16 lenses!
Scott
Sorry I don't have any photos yet, but this process is pretty straight forward.
1) Purchase some Schedule 40 4" PVC pipe
2) Cut about 1/2" off of the end
3) Attach an 86->82mm STEP DOWN ring to the end of the PVC pipe using some gorilla tape around the edges.
4) At this point, the PVC pipe is too wide of a diameter to fit properly over the sigma lens. Two options:
a) Buy a new sigma lens cap, cut it, and attach the pipe to it. I have the lens cap but haven't gone this route yet.
b) Add some padding to the inside of the PVC so that it fits snugly over the sigma lens. I used two layers of 3M Heavy Duty mounting tape, leaving the red plastic backing on. It is a perfect fit.
5)
If you have an 82mm filter, you can attach this to the bracket and then mount it on your lens. Although I haven't tried, I suspect that you can do a full 8mm with an 82mm filter.
Otherwise purchase a 82mm->77mm STEP DOWN ring. Then use 77mm filters.
You will get some vignetting with 77mm filters at 8mm. If you are shooting 2.4:1 then it is not a problem. Otherwise you need to zoom to approximately 9.5mm to completely clear up the vignetting.
Hope this helps people filter their 8-16 lenses!
Scott