About Our FD to EF Conversions Kits

About Our FD to EF Conversions

Please completely read this message before purchasing our DIY FD to EF conversions kits. With your purchase you acknowledge that you are buying at your own risk and that you are comfortable modifying your lens. I recommend reviewing our conversion videos before purchasing. If you still want to convert you lenses but are not comfortable with the DIY approach. I can recommend a couple of lens conversion shops that resell my kits and have trained professional technicians.

The FDn (New FD) conversion kits are fully capable of reaching infinity focus and are the simplest to convert. Canons design of this series were based on common design specifications. The simplicity of Canon’s manufacturing process enables a single conversion plate design to be used several lenses.

Please be aware that FD breech lock Canon series lenses vary in design and as a result some FD lenses using our FDtoEF conversion may need calibration in order to achieve infinity focus. Without a post conversion calibration, we cannot guarantee that all FD lenses will reach infinity focus without some adjustment being made. There are physical limits to any conversion system enabling infinity focus with these older lenses. As a result, design tradeoffs are made to maintain product quality, function and the ability to achieve infinity focus. The infinity focus limitation is more apparent when shooting wide open.

Compatible EF mounting conversion plate

Available conversions: Several more lenses will be added in the future. Canon FDn lenses that are currently available:

FDn 14mm f/2.8 L
FDn 15mm f/2.8
FDn 17mm f/4
FDn 24mm f/1.4 L
FDn 24mm f/2
FDn 24mm f/2.8
FDn 28mm f/2
FDn 28mm f/2.8
FDn 35mm f/2
FDn 35mm f/2.8
FDn 50mm f/1.2
FDn 50mm f/1.4
FDn 50mm f/1.8
FDn 85mm f/1.8
FDn 100mm f/2
FDn 100mm f/2.8
FDn 100mm f/4 Macro
FDn 135mm f/2
FDn 135mm f/2.8
FDn 500mm f/8 Reflex
FDn 20-35mm f/3.5 L Series Zoom
FDn 24-35mm f/3.5 L Series Zoom
FDn 35-105mm f/3.5 Zoom
FDn 70-210mm f/2.8 Zoom

Our conversion mounting plate is a CNC machined plate that utilizes all the mechanical features present in the EF lens.

Lens lock indent – locks lens in place on the camera body when the lens is twisted onto the EOS camera body. The lens can be unlock and removed like any traditional EF lens.

The Lens aperture selection indicator – The conversion mounting plate was designed with ease of use in mind. The converted FDn lens is rotated to one side so that the aperture setting selector on the lens is viewable.

Universal Mounting Conversion Plate – The FDn to EF conversion was designed to be used on a variety of FDn lens, both three and four screw mounts

Reversible non-destructive conversion – There are a few one way conversions out in the market, our conversion is a reversible non-destructive conversion kit. Later if you decide to reverse the conversion back to its original FDn mounting style, you can change the lens back to the original mount without worries by reversing the assembly process and you have your old faithful FDn lens back.

Finally infinite focus without compromise, because the FDn to EF conversion replaces the original mounting plate and aperture control mechanism maintaining infinity focus resulting in better image quality. This is accomplished by not using any corrective lens that other cheaper adapters utilize.

Aperture control

The replacement aperture control mechanism maintains full manual aperture control utilizing the original external aperture control ring. You are not limited to one f/stop, which is the case with some conversions. With our kits you will receive a lens specific aperture control ring.

Camera programmable Dandelion autofocus-confirmation chip

One of the problems of using manual focus lenses on Canon EOS bodies is that focus confirmation is disabled. When AF lenses are used – even in manual focus mode – all Canon EOS bodies confirm focus with a dot in the viewfinder and an (optional) audible beep.

However when non-EF compatible lenses are used via an adapter, the focus conformation is disabled. Unless the camera thinks that an EF compatible lens is attached to it, it switches off both visual and audible focus indication.

If the camera could somehow be tricked into thinking an EF lens was attached, then the focus confirmation indicators would work with any lens attached. Well, this is just what the developer of the Dandelion AF chip has done.

Compatible Lens:

Cropped Sensor (APS-C) 7D, 60D, 50D…. & Rebel’s are fully compatible with the all lenses.

Full Frame 1D/1Ds, 5D MKII & MKIII are fully compatible with the following lenses:

FDn 14mm f/2.8 L
FDn 17mm f/4
FDn 24mm f/2
FDn 24mm f/2.8
FDn 35mm f/2.8
FDn 85mm f/2.8
FDn 100mm f/2
FDn 100mm f/2.8
FDn 100mm f/4 Macro
FDn 135mm f/2
FDn 135mm f/2.8
FDn 500mm f/8 Reflex
FDn 35-105mm f/3.5 Zoom
FDn 70-210mm f/2.8 Zoom

Full Frame Sensors – 5D MKII & MKIII Live View ONLY – Live View is recommended with the following lenses due to the size of the mirror in these cameras.

FDn 15mm f/2.8
FDn 17mm f/4
FDn 20mm f/2.8
FDn 28mm f/2.8
FDn 24mm f/1.4 L
FDn 28mm f/2
FDn 35mm f/2
FDn 50mm f/1.2
FDn 50mm f/1.4
FDn 50mm f/1.8
FDn 50mm f/2.0
FD 55mm f/1.2 All versions
FDn 20-35mm & 24-35mm f/3.5 L Series Zoom (Between 24mm and 35mm the mirror clears the lens. Starting a about 22mm to 20mm the mirror will catch on the lens. Move the zoom back to 23mm to release it)

Skills Required: Comfortable handling small screws and disassembling and reassembling a lens. Instructions will be provided