Tyr's Insane Macro Day.

So I reverse mounted my A 28mm f2.8 on my DA 50-200mm...

Focusing rind becomes magnification control and focusing ring.

Pictures coming as soon as they come off the card.

The magnification is crazy and the time it takes to get anything in focus is mad.

Harsh sunlight only I'm afraid, there isn't enough light if I diffuse it.

EDIT: Sadly I have discovered they are all out of focus

Oh well, off to try again...

Do you know of any suppliers of the filter-to-filter type reversing adaptors?

There are hordes about with the bayonet one side and filter the other, for reversing a lens directly on to the camera mount, but I haven't seen the type that you're presumably using.

I found some from China, but decided against it and I was recommended a UK based manufacturer but I can't remember the website. Do a search on the forum and you may find it.

I fixed the 28mm lens to the inside of the lens hood of the 50-200 and made sure it was level with an empty filter so they pressed against each other (but no glass made contact).

I'd take a picture but, the only working camera in this house is currently my K10D. The S20Pro is in Germany...




This is fun, except the light has gone And I've discovered that F16 and above vignettes quite badly. F11 is about right but lacks DoF.

No PP on any of these, just exported for web from RAW. No cropping, these are full frame.

One of my hairs and some dust on paper:


This one is at F11 and still has some vignette, obviously the aperture of the A 28mm F2.8 is too small, I should really use my A 50mm F1.7.

Amethyst crystal:


You can see what I mean by vignette at F32

I Know what I was doing wrong!!!

I forgot to turn SR off on the tripod

Tyr

If you use 2 sec timer when on a tripod the camera will automatically turn off SR.

Well here we are, SR off, artificial light and a funky setup.

Hair (Full Frame):



Great British Pound Coin (Full Frame):



Hair is transparent.

Hair (100% Crop):



Great British Pound (100% Crop):





I didn't know that, I've been using 2s timer all along, otherwise the camera shakes like mad.

It's very easy to check. Just press the INFO button when the camera's in Capture mode (ie not Playback mode). The 'hand' icon is greyed out and has a line through it when it's set to the 2s timer, but not when it isn't.

It's disabled in both self-timer modes, and both remote modes.

Incidentally, this is a very good example of how difficult it is sometimes to really test things properly.

You had out-of-focus shots, switched off the SR, and then got in-focus shots. Not unreasonably, you deduced that it was SR causing the problem.

Now we know that if you really were using the 2s timer, and there's nothing wrong with the camera, the SR was off all the time, so wasn't the cause of the original lack of focus.

I'm absolutely NOT criticising you for making this mistake - I'd probably have drawn the same wrong conclusion if I hadn't happened to know that the remote modes switch off the SR, but I do think it shows just how easy it is for urban myths to get about.

I haven't seen any evidence of tripod-mounted SR causing problems. But that is almost certainly because I haven't done any long exposures on the tripod without using one of the self-timed or remote options.

I think this is actually a very hard one to test - since to find out if SR causes problems, you have to physically press the button, and it's virtually impossible to do this without disturbing the tripod.

EDIT:

I suppose if you had a very long exposure (many seconds), any initial shake from physically pressing the button would be unnoticeable, and if there was still evidence of shake (not accounted for by focus problems), maybe it would be evidence of prolonged sensor movement during the exposure.

But this is one where life's too short, and the benefits too few, to warrant the science.

After that I discovered that my dioptre adjustment bar had been moved, which explains why it was out of focus. I corrected it for the shots in my last post.

I wasn't aware you could put 2 lenses together like that
great magnification.
You could probably make that adapter yourself by joining 2 together

I dont usually turn off SR when using a Tripod but i will from now on.

The only problem with reverse mounting like this is you loose a fair bit of resolution. The DA 50-200 isn't really a high resolving lens either so it gets worse. I hit the resolution limit when looking at a leaf, I really need a microscope

Anyone want to guess what this is?

100% crop (resolution isn't too good):



It is titled in my gallery and the full image is there too so don't go looking (yet)

I had no idea so I went to peek. I won't say, of course... other than that even now I know what it is, I still have no idea

EDIT:

Ah. I've looked at the right one now. Ok. I would never have got that. It's not that obvious to me even with the full frame

Animal, Mineral or Vegetable

It is man made.

I have a Blackadder related clue as well if anyone wants it.


EDIT:

I can't remember the last time I had this much fun!

EDIT 2:

I've gone over 1000 shutter actuations! 1014 is the current count. So far 40 keepers from today.

Is it a button of some description :
Clutching at straws though