The Fotospeed FR10 Farmers Reducer 4x250mLis a silver reducer supplied as powder. Traditionally used for B&W negatives, it can also be used for reducing the density of B&W prints or any material where silver is the base.

Hypo Crystals Are Supplied    Supplied As a Base    Reduces The Density of B&W Prints    Used for B&W Negatives

A silver reducer supplied as powder.

Hypo crystals are supplied in the kit for the re-fixing of the image after reduction.

It can also be used for reducing the density of B&W prints or any material where silver is the base.

Traditionally used for B&W negatives.

Related Questions and Answers

Q: 1. The height measured as 0.79 This is the size of black part only or with screw on top?

A: Igor,Yes, this is the size of the black plastic part only. The screw on top is not considered in the .79 measurement.

Q: 2. Can I use this with Astera AX1 tube?

A: No, the Gravity Stands SF 36 Z 38 M Reducer Flange (35mm to 3/8" Male) is a 3/8" thread. The Astera AX1 has a 1/4-20" thread mount.

Q: 3. Does it work with Red Komodo and Canon Primes?

A: The Venus Optics Laowa 0.7x Focal Reducer for Probe Lens (EF to R Mount) can mount onto the RED DIGITAL CINEMA KOMODO 6K Digital Cinema Camera (Canon RF), but its designed for the Venus Optics Laowa 24mm f/14 Probe Lens for Canon EF, not general Canon EF primes. See the link below: https://bhpho.to/3FWfW0S

Q: 4. What color the indicator dye would make it to become after exhaustion?

A: The Fotospeed SB50 Odorless Indicator Stop Bath turns blue when exhausted.

Q: 5. Will this adapter allow for autofocus on the Mamiya lenses? Will it work with the leaf shutter if the mamiya has a leaf shutter?

A: The KIPON Baveyes Focal Reducer Mamiya 645-XD 0.8x does not support auto focus or any other electronic communication between the camera and the lens. Only the camera shutter will function, not the leaf shutter in the lens.

Q: 6. can I use this on a Explore Scientific ED102 FCD 100 with a ZWO ASI 1600 MM camera?

A: Yes it should work

Q: 7. Would this fit the Auray SS-37S?

A: The Auray SS-37S Height-Adjustable Medium-Height Steel Speaker Stand has a standard 1.375" (35mm) diameter and an adapter for 1.5" (38mm). We have not tested the K&M 24521 Reducer Flange for Speaker Stand with the Auray SS-37S, but based on the dimensions, it should fit on the Auray stand.

Q: 8. Will this work with my Lunt 152mm ED APO f/8 which has a 3 inch Feather Touch focuser?

A: Yes, the ES 0.7x Reducer should work reasonably well with a 3 inch focuser. There are three options for attaching the reducer to a focuser, a 3 inch adapter and two smaller adapters. The upper left cylinder in the product photo is for a 3 inch focuser. It has a 76mm outside diameter and 74mm ID with female threads. The 3 inch adapter screws on to the bottom (scope side) of the reducer. It appears to be designed to either be inserted into the focuser tube or screwed on, depending on your setup. I use it with a 127mm f/7.5 APO and it covers a full frame (35mm) sensor with sharp stars, but with some vignetting in the corners. Two issues I have with the reducer are 1) the T adpater is standard 42mm, as opposed to 48mm, and so produces more vignetting than is necessary given its 3 inch optics. 2) Given the 55mm T adapter shoulder to sensor plane recommendation, there are no 48mm threads or room for a screw in filter. I just ordered and adapter that will allow for screw in filters on the focuser end of the reducer.Hope this helps.

Q: 9. Although this is advertised for the Probe lens, it seems like it would work with any EF lens...Right?

A: Correct, the Venus Optics Laowa 0.7x Focal Reducer for Probe Lens (EF to L Mount) can be used to adapt EF lenses to L-mount bodies.

Q: 10. What are the thread mounts on the top and bottom. Description says 3/8 male and 1/4 female but it clearly looks opposite in the images. If mounting to a 3/8 on a tripod, would this reduce to mount a camera with 1/4 on top?

A: That is correct, the smaller (1/4 male) threads are on the top...