A recent article in Outdoor Photographer magazine sold me on ignoring my already outdated scanner and digitizing some of my 30,000 old slides the modern way--by shooting macro photos with my DSLR. I didn't just forget the slides for 10 years, but only scanned maybe 100 as needed...then forgot them for 10 years.
So I got lucky and found a Pentax Slide Holder 1X K over in Japan on ebay...basically a tube that has a neutral white diffuser over one end, with a slide holder slot next to that light source. No glass inside, just fixed extension of 100mm. The other end of the tube is designed to take the reversed end of a normal lens...reversed for magnification. Then you point it at your light table or rig a flash off camera. Seemed way easier than a bellows unit and racks and add on slide copy bellows etc. So it finally arrived...
Well I figured this 30+ year old Slide Holder rig could be used with a macro lens NOT reversed and copy slides with a lens optimized for copy work. Yeah, this time I was right. Because I'm still shooting an APS body I don't need 1:1 Macro...at least for now. Desiring a neutral color cast lens lead me to older models. So I started with an A 50mm f/2.8 Macro lens and dialed in the half life size 9.44 inch minimum focus distance to work.
The rig: camera body, 20mm auto extension tube to reduce minimum focusing distance, Pentax A 50 Macro, knurled Pentax Reverse Adapter 49mm, Slide Holder 1X.
Focusing is with magnified live view. Shutter tripped with remote cable and 2 second delay which also locks up the mirror. Shake is moderated with this tube, but it does translate.
For light I ran a wired system with 540 souped up with Quantum Turbo battery for the actual shooting. Tipped a color corrected light table (from my slide shooting days) on it's side pointed at me so the vertical wall of light provided focusing and positioning light--the Slide Holder 1X has a rotating slide mount for positioning in the frame.
This is first few hours JPEG work while dialing it in. Completely unbelievable results...good enough to reshoot my old scanned slides (maybe after I get a K2 or something?). I have control of adjusting white balance both with digital controls in the camera body and by altering the light source (see photos). I also have the ability to change exposure slightly and started playing with using the highlight blinkies to dial down the exposure in live view until about half the blinkies are gone. Real world, if it's blown out or blocked up on the original transparency it isn't recoverable, but basic mods work surprisingly well! Amount of dust as seen in the droplet photos is a tolerable amount to spot away...at least as easy as fixing a scan.
So now I have a 35 Macro Ltd on order to see if I can get away without extension tube? A math person could figure this out...shooting full frame slide onto APS at 104mm working distance including reverse ring. The 35 has a minimum focus distance of 5.5" but I think that's from the sensor not from the front element? And exactly how far out does it rack when focused close? Rather than struggle with the math, I ordered the lens in the marketplace. If extension is required, it's required?
Stonefly Husks are 3 full stops apart. Original was somewhat overexposed but not blown out. Simply used exposure compensation for this much range.
Ram images show first Shade white balance, second is 5000 Kelvin white balance, third is Cloudy white balance and last one is Flash auto multizone or whatever that's called...I have a different example with natural light too.
First droplet photo was shot at meter, second was at minus 1 exposure compensation which is what knocked down half the blinkies in the highlights. The few dust specks will be easy to fix. I prefer the greens at meter, prefer the grass bloom at minus 1 so this process could be enhanced in Lightroom or...
Last edited by Ron Boggs; 03-02-2018 at 05:56 PM.