65mm Super- Angulon f/8 vignette solutions on 4x5

[JimboWalker]

Instead of trying to find a $400.00 center filter for the 65mm Super-Angulon, does anyone have a tried and true work flow to minimize the vignette issue with this lens in Photoshop? I have worked some on this, but it seems like it might be a combination of overexposure of the neg to compensate for the dark edges and a vignette controls in Photoshop. I would like to have anyone else's experience with this issue. Thanks!

[Eric Woodbury]

I couldn't find any $400 CFs, but look to Igor for some that are less than $200.

[JimboWalker]

Igor?

[Dan Fromm]

igorcamera.com/

Super Angulon 65/6.8? Ain't no such beast. Angulon 65/6.8, for 2x3 (6x9 in metric) that barely covers its intended format. Super Angulon 65/8, claimed coverage @f/22 @infinity 155 mm. Super Angulon 65/5.6, claimed coverage 170 mm.

Which do you have?

The list has a link to my article on center filters. Read it.

[MAubrey]

Igor?

www.igorcamera.com/

[LabRat]

igorcamera.com/

Super Angulon 65/6.8? Ain't no such beast. Angulon 65/6.8, for 2x3 (6x9 in metric) that barely covers its intended format. Super Angulon 65/8, claimed coverage @f/22 @infinity 155 mm. Super Angulon 65/5.6, claimed coverage 170 mm.

Which do you have?

The list has a link to my article on center filters. Read it.

I have a SA f8 that allows for a few mm rise, but covers fully (with some fall-off that doesn't bother me too much on chrome film), but an Angulon f6.8 cuts off the corners considerably... So no, does not completely cover...

Mine ended up on a DIY panoramic camera made from a stereo 35mm camera with the area between the two windows milled out to about 3 5/8" wide opening, or like Dan sez; 6X9...

Steve K

[JimboWalker]

Sorry, It is an F8 lens.

[Oren Grad]

Sorry, It is an F8 lens.

OK, thread title corrected.

[Dan Fromm]

Jimbo, with a 65 mm lens centered on 4x5 the corners will be ~ 2.5 stops down from the center. With decentering movements -- shift, rise, fall -- the difference will be greater. But with a 65/8 SA decentering movements will lose image quality ...

If you're shooting reversal film, you'd best ante up for a center filter. If you're shooting negatives, film latitude should save you if you burn and dodge.

Try things out.

[JimboWalker]

Wow!! I did not suspect a 2.5 stop difference in exposure from center to outside! I will be shooting B&W negs primarily. I'm not sure what Center Filter model number to look for. Igor has various Center Filters for the larger, 67mm. They are very $$. My lens has only a 49mm filter size. I imagine this filter is very rare indeed. My thinking now is to expose maybe 1.5 over normal and handle the rest in Photoshop. I have no darkroom and use a local lab that does a fine overall job. They are closed down now, but can hopefully open up soon. Thanks!

[mdarnton]

I wonder if there might be more bang/buck impact by putting the money into a 65/5.6? The lens itself isn't huge, but there's more coverage. Those who have them both might know whether more coverage brings less fall-off in the crucial zone?

That's a question, not an assertion!

[Dan Fromm]

Jimbo, use the list. It has a link to my article on center filters. The article answers your questions. If you don't know what the list is, ask.

Oh, yeah, film's latitude is your friend.

Michael, I have a 65/8 Ilex (= 65/8 SA clone), 65/8 Fuji (the same, don't ask) and a 65/5.6 SA (the price was so right that I couldn't resist). All have the same fall off. The f/5.6 has better image quality farther out and, as expected, less illumination out there. It is brighter wide open than the f/8ers, which I've never had difficulty focusing.

[JimboWalker]

Thanks ! This is a big help. Knowing the falloff is the same for all 65mm lenses, I will not invest in a 5.6 version hoping for less issues. I seldom use my 65mm and use it on a Pacemaker Graphic 4x5 so with the lens buried in the body, there is not a lot of room for movements anyway. Let me know info on your list.

[Dan Fromm]

Jimbo, the link is in the first post in this https://www.largeformatphotography.info/forum/showthread.php?138978-Where-to-look-for-information-on-LF-(mainly)-lenses discussion.