Macro using 50mm reversed - DPChallenge Forums

Tamron SP AF 17-50mm f/2.8 Di II LD Aspherical (IF) for Canon

07/20/2006 12:42:13 PM · #26

Originally posted by dudephil:

... Not on Minolta Doc. KM lenses are spring loaded and pushed via slider in the camera. He'll definitely have to wedge it open with something.

For now I went with an inexpensive manual lens, so sorry - no $$$ coming from me to dudephil industries! ;^)

Phil

Canon EOS-7D

07/20/2006 12:46:20 PM · #27

Originally posted by glad2badad:

Originally posted by dudephil:
... Not on Minolta Doc. KM lenses are spring loaded and pushed via slider in the camera. He'll definitely have to wedge it open with something.

For now I went with an inexpensive manual lens, so sorry - no $$$ coming from me to dudephil industries! ;^)

lol. Unless it has an aperture dial you'll still need to purchase my super duper new age aperture wedge. I'll make you a discount - say 20% off?

hopper

Canon EOS-80D

Canon EF 35mm f/2 IS USM

07/20/2006 12:47:24 PM · #28

there's no way this worked .. the reversed lens has exactly zero affect on DOF - it simply acts like a magnifying glass.

right?

Originally posted by DrAchoo:

Here's a trick you can at least do on a Canon. I'm not sure if it will work on the Minolta. Put your 50mm on the camera, set to the aperture you want, push the button that lets you view through that aperture (usually used to check DOF), and while the button is pushed, remove the lens. The aperture stays to what it was set at.

I goofed a bit with reversing and actually I wanted to set the aperture to something much smaller to try to maximize the DOF. at 1.8 your DOF on a reversed lens will be literally a few mm at best.

07/20/2006 12:50:10 PM · #29

Originally posted by dudephil:

Originally posted by glad2badad:

Originally posted by dudephil:
... Not on Minolta Doc. KM lenses are spring loaded and pushed via slider in the camera. He'll definitely have to wedge it open with something.

For now I went with an inexpensive manual lens, so sorry - no $$$ coming from me to dudephil industries! ;^)

lol. Unless it has an aperture dial you'll still need to purchase my super duper new age aperture wedge. I'll make you a discount - say 20% off?

Thanks for the discount offer...but, no thanks. ;^) Yep, has an aperture dial. He-he.

Tamron SP AF 17-50mm f/2.8 Di II LD Aspherical (IF) for Canon

07/20/2006 12:52:02 PM · #30

Originally posted by hopper:

there's no way this worked .. the reversed lens has exactly zero affect on DOF - it simply acts like a magnifying glass.

right?

Plus you'd have the issue of vignetting wouldn't you?

Phil

Canon EOS-7D

07/20/2006 01:03:08 PM · #31

Originally posted by glad2badad:

Originally posted by hopper:
there's no way this worked .. the reversed lens has exactly zero affect on DOF - it simply acts like a magnifying glass.

right?

Plus you'd have the issue of vignetting wouldn't you?

Yes you would. I also saw in the first post you are planning to use this with your 90mm prime lens. I would recommend you use it with your 70-300. Your focus on the subject will be measured in microns and the zoom will allow you to fine tune quite a bit easier (if your tripod mounting) than the prime will. Also, the more zoom you use the less chance of vignetting you'll have.

DrAchoo

Panasonic Lumix DMC-LX5

Canon EF 24-105mm f/4.0L IS

07/20/2006 01:10:28 PM · #32

That could totally be true hopper. I was just goofing with it even without a real reversal ring. I just assumed another aperture would also affect the DOF.

It did definitely lead to vignetting.

Canon EF-S 17-55mm f/2.8 IS USM

07/20/2006 01:41:29 PM · #33

Originally posted by dudephil:

... I also saw in the first post you are planning to use this with your 90mm prime lens. I would recommend you use it with your 70-300. Your focus on the subject will be measured in microns and the zoom will allow you to fine tune quite a bit easier (if your tripod mounting) than the prime will. Also, the more zoom you use the less chance of vignetting you'll have.

Thanks. I'll experiment with both and see how it goes. Need to order the macro coupling rings. Last night, just goofing around, I tried using my Lensbaby 2.0 by holding it in front of the Tamron 90. It worked pretty well! ;^)

eschelar

Canon EOS-7D

07/25/2006 09:54:23 AM · #34

That's affirmative Doc. No DOF effect from aperture on a reversed lens.

here's a couple more to get ya going!

That hair should give you an idea of the shallow DOF too... That was a split end from a single hair that I PRESSED to flatten before the shoot.

I just 'sold' a print of the second one... I'm seriously considering trying to upsize it and get it on DPC Prints...

It's a great technique.

I will add that I find that the 50mm f/1.8 isn't very sharp when reversed in front of my 80-200 or my S2 IS... I don't know why this is. The 80-200 reversed in front of my S2 IS is insanely sharp.

I don't have any couplers yet... One of these days I'll place a big order with B&H... need to get some more lenses first though... :)

Message edited by author 2006-07-25 09:56:02.