Asahi Pentax


The Honeywell Repronar 805A slide copier was made by the Heiland Division of Honeywell. The camera is an Asahi Pentax with fixed bellows lens 50mm f/4, mounted on a bellows rail with a rack and pinion mechanism for advancing the lens or the camera body. There’s more on the Honeywell Repronar in the Macro photography section.

Although the whole camera assembly is mounted on a vertical stand with the lens pointing down towards the stand base – there is a flash strobe built into the base for copying slides and such. Once upon a time, this was standard equipment for most professional labs and school photography departments.

These days, as schools and colleges close down their photography departments; I’ve been noticing these items come up on EBay and going pretty reasonably. This is a heavy beast, and the shipping will cost almost as much as the item itself.

The Repronar comes WITH the camera and lens, so what’s not to like? Also, the camera is a very early BLACK Pentax SLR without a prism. It comes with a waist-level viewfinder (actually, eye level, when the camera is mounted on the Repronar base.

The real beauty of this system is that it has a scale device attached to it which makes setting for different magnifications very easy – the magnification range is 1/2x, 2/3x 1x, 2x, 3x and 4x. Just set the required magnification, fine focus and fire away. Using the flash is simplicity itself. Turn on the flash switch in the base, make sure the camera sync cord is connected and fire. The camera assembly can also be dismounted from the base and used as a bellows mounted camera provided you can stabilize the system horizontally.

Although the system can be used for transparent and semi-transparent subjects (flower petals, insect wing details etc) with the built in flash, the Repronar really comes into its own as a Macro system if you can get enough external lighting to the mounting platform. The best way to do this is to take the whole thing outdoors and place it on a table in open (sky illumination or in sunny situation. Mornings are best. All that remains is to set the magnification and provide sufficient exposure.

The problem with macro photography with the bellows and small apertures is getting sufficient image forming light. High magnification coupled with a reasonable depth of field means using extended bellows lengths, and small apertures. I was using Fuji 100 film for greater resolution and set aperture for f/16 for maximal depth of field.

There’s no light meter or TTL metering on the Repronar, so I tried to use a chart and then tried to figure out the exposure factor to compensate for the reciprocity failure. Finally I went with common sense, and the Sunny f/16 rule. Sunny 16 rule says that for 100 ASA, I’d need a 1/125 second shutter speed at f/16. Allowing for the light loss, for 1x magnification, I figured doubling the time to 1/60 second would give me the correct exposure.

Since the Repronar is designed to always work with the Flash, I figured it probably syncs at 1/60th second fixed, so the exposure would be correct for 1x magnification at least. For magnification greater than 1x, I decided that I’d set the Pentax camera to B and guesstimate the exposure length. Since at 1x magnification, the fixed 1/60 sec at f/16 would be sufficient exposure, I used 2 seconds for the 2x, 3 seconds for 3x and 4 to 5 seconds for 4x magnification. The guesstimates turned out fine, as can be seen from the images. Next time, I may use a Weston 6 Exposure meter. Or maybe not.


Tulip Tree leaf, Leafminer Trail 1:1, Flash mode
Tulip Tree leaf, 1:1, Flash mode
Dogwood leaf, 1:1, Flash Mode
Dogwood leaf, reversed, 1:1, Flash Mode
Carpenter Bee Wing, 2:1 (2x on film), Flash Mode
Pin Oak Acorn, 2:1 (2x on film), 2 sec at f/16, Daylight
Cucumber Flower, 2:1, Low Flash Mode
Cucumber Flower, 1:1, Flash Mode
Cucumber Flower, 2:1, Flash Mode
Crushed Chili Pepper, 1:1 (1x on film), 1/60th sec at f/16, Daylight
Crushed Chili Pepper, 2:1 (2x on film) 2 sec at f/16, Daylight
Crushed Chili Pepper, 3:1 (3x on film), 3 sec at f/16, Daylight
Crushed Chili Pepper, 4:1 (4x on film) 4 sec at f/16, Daylight
US Quarter, 1:1 (1x on film)1/60th sec at f/16, Daylight
US Quarter, 2:1 (2x on film), 2 sec at f/16, Daylight
US Quarter, 3:1 (3x on film) 3 sec at f/16, Daylight
US Quarter, 4:1 (4x on film) 4 sec at f/16, Daylight
US Quarter, Obverse 3:1 (3x), 3 sec at f/16, Daylight
US Quarter, Obverse, 4:1 (4x) 4 sec at f/16, Daylight
Ghostly Chile Pepper flower, 1:1 (1x) 2 sec at f/16
Nasturtium flower, 1:1 (1x) 2 sec at f/16

Photographed with a Honeywell Repronar Asahi Pentax Camera, 50mm f/4 Bellows lens, Fuji 100 film at f/16. Exposures as indicated in captions. Flash mode photographs used the built in Repronar flash in the base of the unit. Morning light was used for daylight pictures.


text and images © 2007 ajoy muralidhar. all names, websites, brands and technical data referenced are the copyright or trademark of their respective owners.
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It’s been so hot and hazy all over Maryland, especially around DC – the humidity saps the strength, and the lighting just doesn’t inspire one to whip out the camera – I’ve been trying to shoot regularly though. I’ve been playing with an ancient Fujicarex II which I picked up recently on EBay in pristine condition in its original case, along with the instruction manual and – get this, 2 additional lenses. Turns out that this is one of the few cameras made with interchangeable front elements. I’ll have a post about this camera soon, just shot a roll of Fuji 100.

I feel guilty that I haven’t posted an entry to OlympusZuiko all of August – but I have been working on restructuring the site, adding a Macrophotography section and Classics section. The Macro section is to try and describe all the macro equipment that I seem to have picked up – from screw-in supplementary diopter lenses, extension tubes and macro lenses to bellows (with their neat dedicated bellows lenses).

In addition, I plan to have a subsection about special purpose cameras like the Honeywell Repronar 805/805A system with its modified early Pentax camera and the Yashica Dental Eye with it’s fixed 50mm ring flash macro lens. The Classic section will cover the few other cameras I have (this would be a good place for the Fujicarex) – the Yashica TL-Super, Yashica Electro 35 GSN rangefinder and of course, this will be the new home for the Ricoh Cameras.

Fall will be a busy time for photography – the quality of the light at any time of day makes it especially attractive, and I plan to make the most of it. I’ve also been working on cleaning up and restoring ( as far as I can manage) the Pentax Honeywell Repronar camera. I should be able to use it for macro pictures in a couple more days, as soon as I figure out how to stabilize the camera and bellows without the Repronar base.


text and images © 2007 ajoy muralidhar. all names, websites, brands and technical data referenced are the copyright or trademark of their respective owners.
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