If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Omega D5 mixing chamber problem.
Omega D5. 4x5. 150mm Zeiss lens. Light drops off on one corner, upper left
as the image appears on easel. I've moved the mixing chamber as much as it can move. Alignment is very close. I have a MF mixing chamber for the same enlarger. It has a cutout for the MF formats. Can I just replace that cutout with the LF cutout and maybe make a difference? Sure, I'd try it first, but mucking with two mixing chambers and possibly ruining both.. well, I thought I'd ask first. (Oh God, why didn't Leitz make a LF condenser enlarger?) |
#2
|
|||
|
|||
Is the fall off during use of the DD mix chamber when printing
4x5 negatives using that lens ? Or is the problem using some other format with 4x5 DD mix chamber? You know of course about that bellows lock lever that allows you to adjust the bellows draw? maybe you need to compress the bellows a little more around the 6" that the lens focuses at. In article , "jjs" wrote: Omega D5. 4x5. 150mm Zeiss lens. Light drops off on one corner, upper left as the image appears on easel. I've moved the mixing chamber as much as it can move. Alignment is very close. I have a MF mixing chamber for the same enlarger. It has a cutout for the MF formats. Can I just replace that cutout with the LF cutout and maybe make a difference? Sure, I'd try it first, but mucking with two mixing chambers and possibly ruining both.. well, I thought I'd ask first. (Oh God, why didn't Leitz make a LF condenser enlarger?) -- LF Website @ http://members.verizon.net/~gregoryblank "To announce that there must be no criticism of the President, or that we are to stand by the President, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public."--Theodore Roosevelt, May 7, 1918 |
#3
|
|||
|
|||
"Gregory Blank" wrote in message
... Is the fall off during use of the DD mix chamber when printing 4x5 negatives using that lens ? Yes, when printing 4x5 with a 150mm Schneider Componon. You know of course about that bellows lock lever that allows you to adjust the bellows draw? Certainly. |
#4
|
|||
|
|||
"Gregory Blank" wrote in message
... Is the fall off during use of the DD mix chamber when printing 4x5 negatives using that lens ? Yes, when printing 4x5 with a 150mm Schneider Componon. You know of course about that bellows lock lever that allows you to adjust the bellows draw? Certainly. |
#5
|
|||
|
|||
jjs wrote:
Omega D5. 4x5. 150mm Zeiss lens. Light drops off on one corner, upper left as the image appears on easel. I've moved the mixing chamber as much as it can move. Alignment is very close. I have a MF mixing chamber for the same enlarger. It has a cutout for the MF formats. Can I just replace that cutout with the LF cutout and maybe make a difference? Sure, I'd try it first, but mucking with two mixing chambers and possibly ruining both.. well, I thought I'd ask first. I thought the smaller light boxes are for getting the light to cover a smaller area? Nick |
#6
|
|||
|
|||
"Nick Zentena" wrote in message
... jjs wrote: I have a MF mixing chamber for the same enlarger. It has a cutout for the MF formats. Can I just replace that cutout with the LF cutout and maybe make a difference? Sure, I'd try it first, but mucking with two mixing chambers and possibly ruining both.. well, I thought I'd ask first. I thought the smaller light boxes are for getting the light to cover a smaller area? It appears from the outside that the only difference is the opening at the bottom of the mixing chamber, over the carrier. However, I am probably wrong. The way things have gone lately, I'd bet that I am wrong. Tonight I will make another effort. |
#7
|
|||
|
|||
"Nick Zentena" wrote in message
... jjs wrote: I have a MF mixing chamber for the same enlarger. It has a cutout for the MF formats. Can I just replace that cutout with the LF cutout and maybe make a difference? Sure, I'd try it first, but mucking with two mixing chambers and possibly ruining both.. well, I thought I'd ask first. I thought the smaller light boxes are for getting the light to cover a smaller area? It appears from the outside that the only difference is the opening at the bottom of the mixing chamber, over the carrier. However, I am probably wrong. The way things have gone lately, I'd bet that I am wrong. Tonight I will make another effort. |
#8
|
|||
|
|||
Actually to compensate for the light loss typical of a
smaller negative carrier opening. In article , Nick Zentena wrote: I thought the smaller light boxes are for getting the light to cover a smaller area? Nick -- LF Website @ http://members.verizon.net/~gregoryblank "To announce that there must be no criticism of the President, or that we are to stand by the President, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public."--Theodore Roosevelt, May 7, 1918 |
#9
|
|||
|
|||
"Gregory Blank" wrote in message
... Actually to compensate for the light loss typical of a smaller negative carrier opening. FYI - I disassembled the 2.25" x 2.75" D5 mixing chamber. Yes, it covers only 2.75" square. Interesting box. It is made simply of five pieces of flyweight white styrofoam and translucent plastic on the negative side. Light enters at the side through a short square mirror-sided corridor. That makes for really diffuse, cold illumination. |
#10
|
|||
|
|||
"Gregory Blank" wrote in message
... Actually to compensate for the light loss typical of a smaller negative carrier opening. FYI - I disassembled the 2.25" x 2.75" D5 mixing chamber. Yes, it covers only 2.75" square. Interesting box. It is made simply of five pieces of flyweight white styrofoam and translucent plastic on the negative side. Light enters at the side through a short square mirror-sided corridor. That makes for really diffuse, cold illumination. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Bronica ETRC problem | Mike | Medium Format Photography Equipment | 6 | August 15th 04 07:38 AM |
Omega D2 Enlarger Question | T R | In The Darkroom | 3 | March 4th 04 03:48 PM |