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Willie Jan
07-15-2009, 08:13 AM
Hi,
i am using a 120 rodenstock macro lens.
When using it at 3:1 i loose 6 stops of light.

Is there someone who did a test between using a closeup lens together with a macro and only using a macro lens? I would like to know if there is a quality drop when using a close up lens. At this moment i do not own a closeup lens, so I can't test it...

Ian Grant
07-15-2009, 08:23 AM
I've used close up lenses on 35mm & 120 and there's a definite drop in quality, it's not so bad if stopped down well.

A shorter macro lens will require less extension, you could try an 80mm enlarger lens.

Ian

Willie Jan
07-15-2009, 09:08 AM
with the 120 macro and an extra bellow in between i can get to about 74cm extension. So 5:1 is possible. With a closeup, i could get further...

most enlarger lenses do not go further than F 32/45. The macro goes to F64.

Lee L
07-15-2009, 10:07 AM
There is also varying quality among close-up (diopter) lenses. The vast majority are single elements. Some are achromats (doublets) and perform to a higher standard. The Nikon 3T and 4T (in 52mm) and 5T and 6T (in 62mm) are designed for use with lenses with focal lengths between 80mm and 200mm. 3T and 5T are +1.5 diopter. 4T and 6T are +3 diopter.

Leica makes a number of close-up lenses which are well corrected doublets and designed for specific focal length ranges. You can probably find a chart for them online. They are called Elpro and came in older roman numeral designations, and newer arabic number designations in 55mm mounts. I don't have all the info on these. Elpro 1 and 2 are for 50mm lenses, Elpro 3 for 90-200mm lenses, and Elpro 4 for 100-200mm lenses. Leitz recommends stopping down to at least f:5.6 for higher quality.

I think that some of the better filter makers and camera makers also made doublet diopters, but don't have specific info. The doublets are usually thicker and have a noticeably wider edge on the mounting ring.

Lee

KenS
07-15-2009, 11:59 AM
You can achieve higher magnifications if you can find a way of reverse mounting your 120mm lens. Failing that, mount one of your enlarging lenses.

Ken

Willie Jan
07-16-2009, 02:14 AM
You can achieve higher magnifications if you can find a way of reverse mounting your 120mm lens. Failing that, mount one of your enlarging lenses.

Ken

i think that is possible. I use a cambo lensboard with an adapter for linhof lensboards. Only firing will be an problem, but with these times i also can use a hood.

Dave_ON
12-26-2009, 10:39 PM
If you want to get adventurous you can reverse an enlarging lens mounted in a copal shutter. There are adapter rings for such a task. I recently obtained the adapters but haven't had a chance to play with them yet.

Dave

Chazzy
12-27-2009, 07:59 AM
Any chance that you could borrow some Luminars?

Q.G.
12-29-2009, 07:39 AM
Hi,
i am using a 120 rodenstock macro lens.
When using it at 3:1 i loose 6 stops of light.

Is there someone who did a test between using a closeup lens together with a macro and only using a macro lens? I would like to know if there is a quality drop when using a close up lens. At this moment i do not own a closeup lens, so I can't test it...

6 stops at 3x is a quite a lot. That lens must be a very asymmetric tele-construction.

Anyway,
Yes, while you don't lose light (as much) when putting close-up lenses on a lens to shorten its focal length, there is a price to pay for that. Using close-up lenses (whether on a regular or macro lens) produces a significant drop in quality.

Q.G.
12-29-2009, 07:46 AM
most enlarger lenses do not go further than F 32/45. The macro goes to F64.

While that may seem important, it isn't.

Stopping down more will increase DoF more. True. But the increase is from "nothing" to "next to nothing".
You will still need to change your way of thinking about how to get everything in focus that must be in focus. DoF will not be the solution.

What stopping down in (futile) attempts to get everything inside DoF will achieve is a rather huge drop in image quality.
Even the best, special purpose lenses (like Luminars) should only be stopped down moderately to maintain image quality at an acceptable level.

So a good thing, in a way, that stopping down will not produce enough DoF anyway. ;)

Q.G.
12-29-2009, 07:50 AM
6 stops at 3x is a quite a lot. That lens must be a very asymmetric tele-construction.

Forgot to add (the obvious - so perhaps not so bad that i did forget ;)): finding a (more) symmetric lens will reduce light loss to (ideally) 'only' 4 stops at 3x.

Bosaiya
12-29-2009, 09:51 AM
While that may seem important, it isn't.

Stopping down more will increase DoF more. True. But the increase is from "nothing" to "next to nothing".
You will still need to change your way of thinking about how to get everything in focus that must be in focus. DoF will not be the solution.


I think this is one of the reasons why macro works so well with large format. Camera movements allow you to adjust the plane of focus in order to maximize the focus on the subject of interest. A good monorail will allow virtually unlimited bellows draw along with movements that would make a pretzel envious. Focusing in the 3-4x range should be a snap.

keithwms
12-29-2009, 10:32 AM
I sometimes use a Nikon 4T closeup lens with the 120 AMED, and am very happy with it. That is a formidable combination. Offhand I don't remember how far the AMED stops down, maybe f/45, but I recall that it often isn't enough by a long shot and one has to think about movements to try to get a bit more focus control.

My latest macro weapon is the rz 110/2.8 adapted to LF; the lens is so bright that you really can work on the movements very effectively, even at high mag (beyond 3:1). The lens certainly isn't optimized for that kind of thing, and it'd not be a good setup if field curvature is a concern, but for everything else... bear in mind that a fast smaller format lens, at high mag, will cover LF. So I have put various nikon lenses, reversed, in a press shutter.

Experiment and have fun!

jnanian
12-29-2009, 10:56 AM
I think this is one of the reasons why macro works so well with large format. Camera movements allow you to adjust the plane of focus in order to maximize the focus on the subject of interest. A good monorail will allow virtually unlimited bellows draw along with movements that would make a pretzel envious. Focusing in the 3-4x range should be a snap.

you can say that again!

Thingy
02-22-2010, 12:45 PM
I use a Schneider Macro 120mm HM Symmar with 5x4, and used in conjunction with a Maxwell HI-LUX Ultra Brilliant Matt 4.7 focussing screen gives a bright image. I think the Schneider lenses are slightly brighter and easier to focus than the Rodenstocks, though this may be a subjective experience derived from my own lenses. I consider the DOF, stopped down within the optimum range, at a magnification of 3x to offer a few millimeters of sharp focus. With macro lenses you will get much better results than either reversing a lens or using a close-up lens. If you shop around, you can buy a Macro lens in good condition for a few hundred pounds. I paid around 400 for a mint Schneider last year.

I can extend my magnification by mounting the lens on a top hat and using Ebony's extension back which gives me an extra 90mm draw to my camera's bellows 365mm draw. The top hat adds an extra 35mm draw to that.

Rick A
02-22-2010, 01:28 PM
Hi,
i am using a 120 rodenstock macro lens.
When using it at 3:1 i loose 6 stops of light.

Is there someone who did a test between using a closeup lens together with a macro and only using a macro lens? I would like to know if there is a quality drop when using a close up lens. At this moment i do not own a closeup lens, so I can't test it...
According to the Manual of Close-up Photography, at that magnification, you need to increase exposure by 4 stops. Be careful when stopping down, too much and you will get diffraction. Enlarger lenses do work very well as macro lenses. Some longer focal length lenses will not function properly for cloe-up or macro due to their construction. Reversing a lens is most times a better way to achieve the results you are after.

Rick

Mike1234
02-22-2010, 02:46 PM
I think this is one of the reasons why macro works so well with large format. Camera movements allow you to adjust the plane of focus in order to maximize the focus on the subject of interest. A good monorail will allow virtually unlimited bellows draw along with movements that would make a pretzel envious. Focusing in the 3-4x range should be a snap.

Some macro bellows for 135 cameras have front swings and tilts. IIRC, at least couple offer them on back too.

Willie Jan
02-23-2010, 02:25 AM
According to the Manual of Close-up Photography, at that magnification, you need to increase exposure by 4 stops. Be careful when stopping down, too much and you will get diffraction. Enlarger lenses do work very well as macro lenses. Some longer focal length lenses will not function properly for cloe-up or macro due to their construction. Reversing a lens is most times a better way to achieve the results you are after.

Rick

"Manual of Close-up Photography"
i will get a used copy of that.

Thanks.

Rick A
02-23-2010, 09:07 AM
I see its available at Amazon.com, I've had my copy for almost 20 years. Very good book many charts and tables of info, and loads of how-to and home built gear.

Rick

Willie Jan
02-23-2010, 01:41 PM
i found one on ebay for 8 pounds sterling.