Christine,

Tomorrow I will reverse a 50 onto another 50 and 105 to see the level of magnification and if there is vignetting how much. So hold on until then.

As I discovered this evening for an experiment of Daves set up, 50 reversed on a 200 gives huge magnifiction. 5 1/2 mm is all you will see in the long side of the viewfinder.

The pogram works well but I have only done staight stacks. I will post screen grabs of the route I took.

The prog is quite complicated so I just took the easy way out once I had found it. :D :rolleyes:

Don

Anyone with a set of bellows may be able to adapt them as a focussing rail.

I have a set of Olympus OM bellows which haven't seen much use in recent years but by adding the 'Focus Stage' and removing the actual bellows bit you have a first class unit to fit many cameras.

Finding a focus stage for sale is the hard bit - I eventually homed-in on one (new!) at B&H in New York at a very reasonable price. B&H seem to have a bit of a 'mixed' rating from customers but I ordered my unit on a Thursday morning and it arrived the following Tuesday morning. This was a few weeks ago when the exchange rate was about $2 to the £ and the total cost including quite a lump for postage was £44

The images were taken in RAW and converted to Tiff 8bit as I don't think the program can handle 16 bit. I guess they could just have easily been Best Quality JPEGs. The important thing is that they are in the same folder. I numbered them 1, 2, 3, 4 etc as I converted them so they would load sequentially.

Open CZM and select File - New then navigate to the folder containing the images. Hold down Control key and select all the images you wish to stack. Once selected go to Macro and select - Do Stack. Then sit back while the program does the stack. Once stacked save for Photoshoping.

Don

Thanks for that Don, I can't wait to give it a try tomorrow, I will try first with the bellows for the macro.

Christine,

Here are a set of full frame pics to show the magnification effect of reversing a 50mm lens on another lens. 50 on a 50 shows serious vignetting. A steel ruler marked in milimeters was used so you can see how large or should I say small the field of view is.

Pic 1 : 200mm f4 with reverse 50mm f1.4
Pic 2 : 105mm f2.5 with reversed 50mm f1.4
Pic 3 : 50mm f1.4 with rversed 50mm f2
Pic 4 : The lunatic fringe and just for fun, 200mm f4 with reversed 24mm f2.8. Focussing this is a nighmare.

Don

Thanks Don, that been a big help, saves me some money and we could do without extra expense at the moment. The magnification looks great with the 200mm and reversed 50mm, I will set my 75-300 to 200 and see what I can get.

Thanks for the links Adey and Don. I've put the 454 micro positioning plate on my "must get when the cash is available" list.

Dave

I'm reliably informed that 'Mr Cad' in Croydon www.mrcad.co.uk have a s/h focus stage in stock for anyone with a set of OM bellows that they want to use as a focus-rail. No idea of the price, though.

I ordered one from these people:

http://www.digitaldepot.co.uk/acatal...cessories.html


They are a bit cheaper. I also ordered a Kirk quick release platform, and I'll get a Chinese AS plate.

Thanks Leif. I have just taken delivery of a 454 from WE, but no doubt others will be interested.

Dave