Century Wide

Ken Diewert · June 4th, 2007, 01:00 PM

I just tried the Century WA .8 for the H1. The corners need to be cropped. Here's a jpeg. I'm supposed to use this again this afternoon, but if I need to crop the images after, then I not sure what the point of using this adapter.

Marty are you out there?

Thanks

Daniel Epstein · June 4th, 2007, 03:20 PM

Ken,
I am not sure why you are seeing cropping on the corners but there are a couple of things you should check. One: make sure you have the adapter all the way screwed on. It is a very tight tolerance to avoid vignetting. Two:check out the F stop you are working with. Sometimes issues show up if you are stopped down to a small aperature which don't show up at wider apertures. Try adding the Built in ND.

Ken Diewert · June 4th, 2007, 07:26 PM

Daniel,

Thanks. I did shoot with it this afternoon. I had my UV filter between the 20x and the .8.

I've now taken it off and it looks to have fixed the prob.

Thanks Again.

Daniel Epstein · June 4th, 2007, 07:32 PM

Ken,
Well I am sure the UV filter was the cause. By the way there should be a spacer ring with the Century Wide Angle so you don't actually rub the front of the 20X lens with the back of the Wide Angle.

Ken Diewert · June 4th, 2007, 11:05 PM

Daniel,

Yeah, I bought it on ebay, but made sure the ring was supplied. It's reassuring to know that that was the problem. I had to slightly crop the stuff I shot today, which kind of defeats the purpose of using a WA adapter, but I think I was still ahead of using the stock 20x.

Thanks again, if you hadn't mentioned the vignetting tolerance, I wouldn't have thought that the UV filter was the prob. Initially, I thought that my lens hood was not on properly, so I took it off and still had the problem.

Marty Hudzik · June 6th, 2007, 06:52 PM

Just saw this thread and can say that is not normal. I did have a problem one time with the wide angle where I was outside in daylight and I left the auto iris on with no ND filter. The camera stopped down to F16 or something crazy. I could not see it in the viewfinder but there some vignetting on the corners....not like yours where you can physically see the lens shade or filter ring. It was just a soft darkening like an effect.

After engaging the ND filter and letting the iris open up this went away.

Sorry I didn't see this at first....

Good Luck.

June 4th, 2007, 01:00 PM	#1
Ken Diewert Trustee Join Date: Mar 2006 Location: Vancouver Island, Canada Posts: 1,200	Century Wide - Corners need Cropping? I just tried the Century WA .8 for the H1. The corners need to be cropped. Here's a jpeg. I'm supposed to use this again this afternoon, but if I need to crop the images after, then I not sure what the point of using this adapter. Marty are you out there? Thanks Attached Thumbnails __________________ C100, 5DMk2, FCPX

June 4th, 2007, 07:26 PM	#3
Ken Diewert Trustee Join Date: Mar 2006 Location: Vancouver Island, Canada Posts: 1,200	Daniel, Thanks. I did shoot with it this afternoon. I had my UV filter between the 20x and the .8. I've now taken it off and it looks to have fixed the prob. Thanks Again. __________________ C100, 5DMk2, FCPX

June 4th, 2007, 11:05 PM	#5
Ken Diewert Trustee Join Date: Mar 2006 Location: Vancouver Island, Canada Posts: 1,200	Daniel, Yeah, I bought it on ebay, but made sure the ring was supplied. It's reassuring to know that that was the problem. I had to slightly crop the stuff I shot today, which kind of defeats the purpose of using a WA adapter, but I think I was still ahead of using the stock 20x. Thanks again, if you hadn't mentioned the vignetting tolerance, I wouldn't have thought that the UV filter was the prob. Initially, I thought that my lens hood was not on properly, so I took it off and still had the problem. __________________ C100, 5DMk2, FCPX

June 4th, 2007, 03:20 PM	#2
Daniel Epstein Trustee Join Date: Jan 2006 Location: New York, NY Posts: 1,267	Ken, I am not sure why you are seeing cropping on the corners but there are a couple of things you should check. One: make sure you have the adapter all the way screwed on. It is a very tight tolerance to avoid vignetting. Two:check out the F stop you are working with. Sometimes issues show up if you are stopped down to a small aperature which don't show up at wider apertures. Try adding the Built in ND.

June 4th, 2007, 07:32 PM	#4
Daniel Epstein Trustee Join Date: Jan 2006 Location: New York, NY Posts: 1,267	Ken, Well I am sure the UV filter was the cause. By the way there should be a spacer ring with the Century Wide Angle so you don't actually rub the front of the 20X lens with the back of the Wide Angle.

June 6th, 2007, 06:52 PM	#6
Marty Hudzik Trustee Join Date: Jul 2004 Location: Canton, Ohio Posts: 1,771	Just saw this thread and can say that is not normal. I did have a problem one time with the wide angle where I was outside in daylight and I left the auto iris on with no ND filter. The camera stopped down to F16 or something crazy. I could not see it in the viewfinder but there some vignetting on the corners....not like yours where you can physically see the lens shade or filter ring. It was just a soft darkening like an effect. After engaging the ND filter and letting the iris open up this went away. Sorry I didn't see this at first.... Good Luck.