achromatic macro diopter on tokina 11-16

Has anyone used an achromatic diopter on the 11-16? Opteka makes a 77mm achromatic diopter that I would like to try on the tokina but I want to see some results first. If you have one please post and share the results. I am trying to see how bad the vignetting will be from the filter and also how soft the corners get. I tried adding extension tubes today and it just flat out wont work on such a wide lens so diopters are my only alternative to getting ultra wide macro shots. Thanks

anyone?

personally, I can't see one practical reason why you would combine that lens with a macro adapter.

So, you might find it hard to find opinions as I doubt there are more than three people on the planet who have ever tried it.

For super wide angle macro this combination could be useful. But I do not have this lens - and use other lenses for wide angle macro images (short extension tubes and relay lenses)

Copidosoma wrote in post #15827362
personally, I can't see one practical reason why you would combine that lens with a macro adapter.

So, you might find it hard to find opinions as I doubt there are more than three people on the planet who have ever tried it.

Ok well I'm hoping someone has some 77mm diopters to test out before I make a purchase. In these shots you can see what I'm aiming for. I have been trying to impose near infinite foregrounds, with a diopter I would do a focus stack on a tripod so that I could macro focus the diopter and then remove it to focus the middle of the field. I have not decided if I want the far background in focus yet but I like were it's going, feels cinematic or tilt shifty? not sure but lots of fun. All of these shots are at 11mm I believe.

IMAGE LINK: http://www.flickr.com …/70374000@N08/8​651038530/

IMAGE LINK: http://www.flickr.com …/70374000@N08/8​651038868/

IMAGE LINK: http://www.flickr.com …/70374000@N08/8​649939643/

IMAGE LINK: http://www.flickr.com …/70374000@N08/8​649939879/

IMAGE LINK: http://www.flickr.com …/70374000@N08/8​649940087/

How about addibg a macro extension tube?

I wonder wheter combining images made with and without diopter could be stacked.
Focal lenght is changed, and probably even perspective point.

ph2003 wrote in post #15828716
How about addibg a macro extension tube?

Normal shortest extension tube is 12mm long.
With a 11mm focal lenght this results near 1:1 magnification ratio. And object plane is probably very near or inside the front lens.

This is a reason why I DIY mad a 8mm extension tube and6mm short macro EF extension tube.
With the 6mm tube I can use the Zenitar 16mm Fisheye lens, and Samyang 14mm/2.8 for macro wide angle images - and all longer focal lenghts too.

ZoneV wrote in post #15828959
I wonder wheter combining images made with and without diopter could be stacked.
Focal lenght is changed, and probably even perspective point.

Normal shortest extension tube is 12mm long.
With a 11mm focal lenght this results near 1:1 magnification ratio. And object plane is probably very near or inside the front lens.

This is a reason why I DIY mad a 8mm extension tube and6mm short macro EF extension tube.
With the 6mm tube I can use the Zenitar 16mm Fisheye lens, and Samyang 14mm/2.8 for macro wide angle images - and all longer focal lenghts too.

Yea I didn't think about the focal point changing, I have never used a diopter before and I may just have to bite the bullet and buy one, not to expensive but if it does not work I have no other 77mm threaded lenses. Interesting that you bring up the extension tubes idea, mine obviously did not work but it seems that your machine work led to success, congratulations with that. I bet you could do pretty well marketing wide angle extension rings.... Is 16mm the limit or do you think you could get down to 13mm with a 3mm ring?

Thank you!
For Canon EF 6mm thickness is more or less the limit - with my current machining and planning setup.
Shorter Canon EF extension tubes are probably (not for sure) possible as a skeletonized version - but I did not spend time for thinking about a shorter one. Probably such extra short will require a different way of lens mounting or such.

For the 16mm lens the 6mm extension tube is not ideal: For me ideal extension tubes result in a more or less contious magnification range. This results in extension tube thickness as thick as lens helicoid focus range (for lenses with helicoids). These super widenagle lenses ar a kind of problem for this wish.

calypsob wrote in post #15828391
In each picture I focused either the foreground, which does not work closer than a foot,

You could try the 10-22. MFD is 9.5" which is quite a lot closer than the 11-16's 12" - LINK

Copidosoma wrote in post #15827362
personally, I can't see one practical reason why you would combine that lens with a macro adapter.
So, you might find it hard to find opinions as I doubt there are more than three people on the planet who have ever tried it.

Hehe. Don't you love it when people make sweeping statements like that.

It's a very popular combination in underwater photography, due to the optical properties of a dome port where infinity is a lot closer.
Google it if you're interested.

Anyhow, since I have that lens on the camera and a Canon 500D achromatic diopter handy, I just did a quick test. Putting the diopter on brought the minimum focus about 60mm closer at 11mm, wide open.

A cheaper option than buying another lens or even the diopter, is to stop it down. At f/22 it is focused right up to the filter.

Steve.

SteveInNZ wrote in post #15843226
Hehe. Don't you love it when people make sweeping statements like that.

It's a very popular combination in underwater photography, due to the optical properties of a dome port where infinity is a lot closer.
Google it if you're interested.

Anyhow, since I have that lens on the camera and a Canon 500D achromatic diopter handy, I just did a quick test. Putting the diopter on brought the minimum focus about 60mm closer at 11mm, wide open.

A cheaper option than buying another lens or even the diopter, is to stop it down. At f/22 it is focused right up to the filter.

Steve.

Perfect, Thanks steve!