Convert a RETO Ultra-Wide Camera into an Ultra-Wide-Wide Camera

David Prochnow

Our resident “how-to” project editor, David Prochnow, lives on the Gulf Coast of the United States in Ocean Springs, Mississippi. He brings his expertise at making our photography projects accessible to everyone, from a lengthy stint acting as the Contributing How-To Editor with Popular Science magazine. While you don’t have to actually build each of his projects, reading about these adventures will contribute to your continued overall appreciation of do-it-yourself photography. A collection of David’s best Popular Science projects can be found in the book, “The Big Book of Hacks,” Edited by Doug Cantor.

Heavily cropped photograph
A heavily cropped photograph using the DIY RETO Ultra Wide Wide & Slim camera.

You’ve got to hand it to RETO Project, they certainly know how to accurately name a camera. Take the RETO Ultra Wide & Slim Camera, for example.

This very small, plastic bodied, 35mm film camera features a fixed, 22mm f/11 acrylic ultra-wide angle lens. Coupled with a single 1/125 of a second shutter speed that is able to shoot ISO 200 film in a wide variety of lighting conditions and you have a great ultra wide and slim camera. Ya see there, how aptly RETO Project named this camera?

Priced at $24.99 from Film Photography Project, the RETO Ultra Wide & Slim Camera steps outta the way and lets you click that shutter and advance the film without a care in the world about any “other” camera settings. Beware, however, during film advance, the film sprocket drive shaft can sometimes “stick” and tear a film sprocket hole.

RETO Ultra Wide & Slim Camera
The RETO Ultra Wide & Slim Camera can be easily converted into a ultra-wide-wide angle lens camera.

All of this carefree camera shutter clicking can occasionally lead to an unexpected problem, however. There could come a time when an ultra-wide angle lens just isn’t wide enough! Sweeping landscape vistas, a cruise ship bon voyage, or a ballroom extension could leave you wishing for a wider ultra-wide angle lens.

Go Wider, or Go Home

Increasing the field of view of the RETO Ultra Wide & Slim Camera will neither break the bank nor is it a difficult DIY project. The basis for adding some more “wide” to the ultra-wide angle lens is a little-known conversion lens manufactured by Tiffen. Priced at $6.95 and called the Tiffen 37mm 0.65X Wide Angle Conversion Lens, this high quality accessory was originally made for threading onto a 37mm diameter digital camera lens.

Tiffen Wide Angle Conversion Lens
This Tiffen Wide Angle Conversion Lens can be added to the RETO Ultra Wide & Slim Camera for increasing the camera’s field of view.

According to Tiffen, this conversion lens could increase the angle of view for a camera lens by approximately 45%. Adding it to the 22mm lens of the RETO Ultra Wide & Slim Camera does increase this film camera’s coverage. The amount of wide angle increase with this film camera will be demonstrated shortly. First of all, this Tiffen conversion lens must be added to the RETO Ultra Wide & Slim Camera.

Cropped photograph reto ultra-wide conversion
The circular border frame can be cropped into a visually dynamic image.

There are three simple steps for adding this lens accessory to this film camera:

1. Remove the trim ring. In order to ensure a snug fit over the camera’s lens, you must remove the trim ring that circles the lens. This ring is just snapped into the camera’s body and can be easily popped off by gently prying with a thin blade.

Trim ring
Remove the lens trim ring and center the conversion lens over the 22mm lens.

2. Center the conversion lens. The Tiffen lens must be centered over the camera’s lens and aligned horizontally with the camera’s body. These two careful adjustments will minimize unwanted distortion. Yes, there will be distortion with this ultra-wide angle lens stacking technique, but you’re trying to make the final optical effect “appear” natural for an ultra-wide-wide angle lens. Nonetheless, negatives that are captured with this accessory lens will have a circular frame on the left and right sides of each exposure.

Assembled camera and reto ultra-wide conversion lens
All taped up and ready to grab some ultra-wide-wide angle photographs.

3. Tape ‘er down. Carefully apply several pieces of tape to securely hold the Tiffen conversion lens in place on the camera body. The two pinch release buttons on the sides of the conversion lens are ideal for holding two of these tape pieces.

Sample photograph
A comparison between this stock RETO Ultra Wide & Slim Camera photograph.
Sample Photograph reto ultra-wide conversion
And this full-frame ultra wide-wide angle photograph made with the Tiffen Conversion Lens. Please note the circular frame on the left and right sides of the photograph.

Test your final assembly by gently shaking the camera and watching for any movement of the taped conversion lens. If everything is still a snug fit, load a roll of ISO 200 film and record your world with your, now, RETO Ultra Wide Wide & Slim Camera.

Enjoy.


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David Prochnow

David Prochnow

Our resident “how-to” project editor, David Prochnow, lives on the Gulf Coast of the United States in Ocean Springs, Mississippi. He brings his expertise at making our photography projects accessible to everyone, from a lengthy stint acting as the Contributing How-To Editor with Popular Science magazine. While you don’t have to actually build each of his projects, reading about these adventures will contribute to your continued overall appreciation of do-it-yourself photography. A collection of David’s best Popular Science projects can be found in the book, “The Big Book of Hacks,” Edited by Doug Cantor.

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