[yeatzee]

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Lightmeter, can you show us some macro tilt pics? I'm interested in whether or not tilt is relevant for macro, how many degrees you use up to? (as opposed to shift which I was always told was the handier of the two wrt macr). When I tried tilt I found that I had to really tilt the lens massively -- too massively -- it meant I had to start using the worse periphery of the lens.

interesting ^ Look forward to seeing some shots

[yeatzee]

Here's my latest, with a reversed el nikkor 50mm F/2.8 on bellows. 97 image stack of a adult female local species praying mantis

[dadipentak]

That's gorgeous, Tanner! The background color is perfect.

[LightMeter]

Lightmeter, can you show us some macro tilt pics? I'm interested in whether or not tilt is relevant for macro, how many degrees you use up to? (as opposed to shift which I was always told was the handier of the two wrt macr). When I tried tilt I found that I had to really tilt the lens massively -- too massively -- it meant I had to start using the worse periphery of the lens.

I don't have any taken with the 645, but here's some taken with my Nikon D300. The first map photo is with no tilt and the second tilted down, shot at the same aperture. You don't need to tilt much. At first I wondered why I couldn't get the DOF where I wanted it. Then realized I was tilting too much. The lens will tilt 8 degrees max. Just tilt 1 or 2 degrees at a time.





Tilting allowed me to get both flowers in focus.

[Nass]

Lightmeter, very interesting and thank you for posting. Though, what I am really interested in is tilt and shift in the macro world. The brochure shot above is obviously tilt but not exactly macro =). I'd love to know what sort of degrees you're setting your tilt to when doing say 1-5x, and how effective you find it, especially to get those planes of focus extending away on micro subjects. I failed on my trials but I'd love to revisit this if it can be made to work =)

[newarts]

Lightmeter, very interesting and thank you for posting. Though, what I am really interested in is tilt and shift in the macro world. The brochure shot above is obviously tilt but not exactly macro =). I'd love to know what sort of degrees you're setting your tilt to when doing say 1-5x, and how effective you find it, especially to get those planes of focus extending away on micro subjects. I failed on my trials but I'd love to revisit this if it can be made to work =)

I've done a bit of work in this area. I am away from it now but can give some simple equations and example soon.

I can tell you that stronger tilts are needed as mag gets high. I think I found about a 26 degree tilt is needed for a focal plane viewed at an angle on the order of about 45 degrees at 1:1... This is only an order of mag recollection.... I will get back with accurate numbers.

It does work and a whole (thin) macro plane can be put in focus.

I bought a nikon tilt-shift bellows to do it. A nice used ebay instrument for about $200e. nikon pb-4. Inexpensive DIY bellows mod is practical depending on original bellows detail.

Good on ebay now: (a couple of these are below $100 bid now. I'd sure buy one for that rather than DIY!)
http://www.ebay.com/itm/Vintage-Nikon-F-Bellows-Focusing-Attachment-PB-4-PLU...item4aafb74cbf

http://www.ebay.com/itm/Nikon-PB-4-Bellows-Focusing-Attachment-/270835469870...item3f0f0d4e2e

http://www.ebay.com/itm/Nikon-PB-4-Bellows-Focusing-Attatchment-MINT-/330625...item4cfad4e14a

I use adapters for lenses; nikon-lens/pentax-mount rear & enlarger-lens-m39/nikon-mount front; 80mm enlarger lens should focus to infinity.

Dave

[Nass]

That's really interesting, thanks Dave - now that I've finally got a proper micrometer enabled stage on its way that's something that really I need to take a better look at more carefully then. Thanks for any info you might be able to provide.

- apologies for making this thread go on a bit of a tangent somewhat *slap self*

[yeatzee]

That's gorgeous, Tanner! The background color is perfect.

Thanks Went for a new type of background on that one, trading in the bright and IN YOUR FACE colors I normally use for something more subtly complimentary

[newarts]

That's really interesting, thanks Dave - now that I've finally got a proper micrometer enabled stage on its way that's something that really I need to take a better look at more carefully then. Thanks for any info you might be able to provide.

- apologies for making this thread go on a bit of a tangent somewhat *slap self*

This diagram shows the setup rearranged for macros. I believe it to be correct:


For example, for a perspective photo of a tabletop at 45 degrees, tilt the camera axis to 45 (pointing straight down would be zero) - for a 1:1 magnification the lens tilt with respect to the camera axis needed is Atan(1/2 Tan 45) = 26.5. To get the magnification right you might put a ruler in the frame - ie. first set the angles then crank the camera up & down till the mag is right.

Hope this helps...
Dave

[dadipentak]

- apologies for making this thread go on a bit of a tangent somewhat *slap self*

Apologies? It's that sort of stuff that makes this thread interesting (if, occasionally, incomprehensible ;~)

[Nass]

Apologies? It's that sort of stuff that makes this thread interesting (if, occasionally, incomprehensible ;~)

I agree, but I also wear a moderator's hat and, erm, it's apparently naughty

Anyhow Dave thanks for posting that, the equation helps a lot. When you were doing this were you using big 645 lenses? Reason I ask is that I normally use elnikkor reversed nowadays, and a 26 degree tilt will mean I'm starting to use the less than great periphery of that lens. It's tiny. That was a problem with SMC-A/M/K lenses reversed too. That's what I put my chronically dire IQ down to, although of course it could have just been plain old incompetence too

[newarts]

........ and a 26 degree tilt will mean I'm starting to use the less than great periphery of that lens. It's tiny. That was a problem with SMC-A/M/K lenses reversed too. That's wehat I put my chronically dire IQ down to, although of course it could have just been plain old incompetence too

That may be a problem for whatever lens you use because 26 degrees is at the edge of a normal image circle i think . Probably it is best to use less perspective.

[newarts]

Apologies? It's that sort of stuff that makes this thread interesting (if, occasionally, incomprehensible ;~)

'nuf said.. Works for non-macros too.

[Nass]

That's a great diagram

[newarts]

That's a great diagram

Thanks. The simplicity of the geometry's procedure (which can be done in practice with only a straight edge or string) was hidden by the math.

Aren't pictures great?