I realise the C cup now exists but I just wanted to draw you guys attention to a solution you may already have.
http://www.ebay.co.uk/itm/3-inch-LC...raphy_Viewfinders_Eyecups&hash=item4cf79d11bb
I used to use a viewfinder similar to this with my Canon 7D and I can now say that the rubber eyecup from it fits the C100 great.
Although the C100 has the unfortunate disadvantage of having a s*%te lcd and viewfinder, I wanted to make the viewfinder better so I could use it for run and gun.
Initially I used a spare eyecup from a Zacuto Z-finder (see below), however this was Less than Ideal as it didnt fit well and I had to cut a groove into the eyecup so the C100 handle didn't push it off.

I used this for a while with a Bluestar Chamois and it worked ok, but it kept my eye far from the finder and it was always trying to wriggle its way off, I used to tie it to the C100 using the bit of string that holds on the Zacuto sunshade.
My next plan however was much more successful (and still is)
Taking the eyecup from the generic viewfinder i had lying around, it moulded itself perfectly around the C100 viewfinder. Although it has a big eyecup, it's very flexible and the C100 lcd can easily push it out of the way without dislodging the eyecup when it needs to open.
I still had my Bluestar Chamois left over from my Zacuto eyecup and with a bit of cutting i got it to fit the generic eyecup:





Here is a few photos of how I use it now. As you can see you have to lift the Chamois a wee bit to open the LCD but its easy and doesn't affect the eyeup.
I'm sure the C cup is probably better than this because it's tailor made, but I thought I would show this to people that may just have it sitting around. Happy to answer any questions people might have.
Peace out
Calum
http://www.ebay.co.uk/itm/3-inch-LC...raphy_Viewfinders_Eyecups&hash=item4cf79d11bb
I used to use a viewfinder similar to this with my Canon 7D and I can now say that the rubber eyecup from it fits the C100 great.
Although the C100 has the unfortunate disadvantage of having a s*%te lcd and viewfinder, I wanted to make the viewfinder better so I could use it for run and gun.
Initially I used a spare eyecup from a Zacuto Z-finder (see below), however this was Less than Ideal as it didnt fit well and I had to cut a groove into the eyecup so the C100 handle didn't push it off.

I used this for a while with a Bluestar Chamois and it worked ok, but it kept my eye far from the finder and it was always trying to wriggle its way off, I used to tie it to the C100 using the bit of string that holds on the Zacuto sunshade.
My next plan however was much more successful (and still is)
Taking the eyecup from the generic viewfinder i had lying around, it moulded itself perfectly around the C100 viewfinder. Although it has a big eyecup, it's very flexible and the C100 lcd can easily push it out of the way without dislodging the eyecup when it needs to open.
I still had my Bluestar Chamois left over from my Zacuto eyecup and with a bit of cutting i got it to fit the generic eyecup:





Here is a few photos of how I use it now. As you can see you have to lift the Chamois a wee bit to open the LCD but its easy and doesn't affect the eyeup.
I'm sure the C cup is probably better than this because it's tailor made, but I thought I would show this to people that may just have it sitting around. Happy to answer any questions people might have.
Peace out
Calum