Canon Eos R100 and 10mm Fisheye manual focus lens. Camera will not take photos.

[niall1928]

I am a new photographer who has used my Canon Eos R100 with the standard 18-45mm lens which comes with the camera. I have used auto settings up until now and am by all means a beginner. So my apologies if my question turns out to be dumb.

I have recently been gifted a 7artisans 10mm Fisheye manual focus lens with two focus rings on the lens. The lens does NOT have a AF/MF switch.

It is compatible with the camera, as when connected I can see clear images on the viewfinder. I can use the rings to achieve a decent focus level. However, when I hit the shutter button the camera will not take a photo. I have done a few hours of research, changing basic settings in the menu, trying all different variations of MF/AF settings while in manual mode. However, the camera simply will not take a photo no matter what I do.

I am wondering if there is something I'm missing here, as I imagine there is a simple solution I'm missing. I would like to be able to take badly focused images to start with so I can learn to use the lens itself, but the camera just won't co operate. Any help would be much appreciated thank you in advance.

[stevet1 · Accepted solution]

nial1928,

It's possible that your lens in not compatible with the R100. When you mount your lens to the camera, what does the aperture say? If it says 00, that means your lens is not talking to the camera, and the camera thinks there is no lens attached.

You could try changing your settings to "Take a picture without a lens", but I don't know if that will help or not

Steve Thomas

[stevet1 · Accepted solution]

nial1928,

It's possible that your lens in not compatible with the R100. When you mount your lens to the camera, what does the aperture say? If it says 00, that means your lens is not talking to the camera, and the camera thinks there is no lens attached.

You could try changing your settings to "Take a picture without a lens", but I don't know if that will help or not

Steve Thomas

[niall1928]

When I turn to aperture priority it says "F00" and when selected the dial does not change this. 

Is this what you mean and does this mean the lens is incompatible?

[deebatman316]

You can't use a lens that doesn't communicate with the camera in Full Auto. You'll have to set the camera to release shutter without lens attached. With the camera set to Manual mode because the lens doesn't communicate with the body that a lens is attached. 

[deebatman316]

If the camera is in Auto Mode that option isn't available. That lens is completely manual and I don't believe it communicates with the camera. Also I'll have to look in the manual to see if that option is available. The EOS R100 removed a lot of options found in higher end cameras. For instance the EOS R100 can not use a speedlite's AF Assist Beam to assist in low light AF. The EOS R100 behaves like the EOS M Series only using the orange LED AF Assist Beam on the camera body. Instead of speedlite sending out a pre-fire to assist the camera in low light.

[niall1928]

Thank you Steve. Changing to release shutter without lens has solved the issue. 

[stevet1]

niall1928,

I'm glad.

Does your lens itself allow you to set the aperture?

Since the lens is not communicating electronically with your camera, you'll probably also have to manually set your aperture. You can electronically set your shutter speed, just not your aperture.

Steve Thomas

[deebatman316]

That lens has an aperture ring on it to set the aperture. Its designed to be a fully manual lens.

[karmlol · Accepted solution]

Seems like Steve is correct in saying that the "release shutter without lens" setting will fix this.

https://youtu.be/lxxq-RUrMZY?feature=shared

[niall1928]

Thank you for the link. That's it! Problem solved.