Tgbyrne

I moved from Nikon to Olympus a few months ago. My newest lens is the 8mm fisheye. This lens and the 7 to14mm zoom do not accept filters. I am designing filter holders for the 8mm fisheye and would like to design one for the 7 to 14mm also but I will need help with this since I don't own that lens. The help I am looking for is this: I need the diameter of the lens at the distal end, the sunshade end and the depth of the sunshade (if it is like the 8mm the shade has the top and bottom petals of the shade are longer than the sides). I will also need to have you try it out for fit and function. You will get to keep the prototype that works.

jcboy3

The lens has the following dimensions

Diameter at top of tall petal: 3.10"
Diameter at top of short petal: 3.09"
Diameter at base of sunshade: 3.08"
Inside depth of sunshade at tall petal: 1.19"
Inside depth of sunshade at short petal: 0.81"
Outside height of sunshade to top of tall petal: 0.98"
There is a black ring below the sunshade, outside height from bottom of black ring to top of tall petal: 1.31"

A very slight taper of the sunshade.

Measured with a dial caliper.

Cdouthitt Loc: Traverse City, MI

There are filter holder options for the 7-14...not sure about the 8mm.

mcveed Loc: Kelowna, British Columbia (between trips)

Somebody already thought of it.
http://nisifilters.com.au/product/nisi-150mm-filter-holder-for-olympus-7-14mm-f2-8-pro-lens/

Cdouthitt Loc: Traverse City, MI

Tgbyrne

[quote=jcboy3]The lens has the following dimensions

Diameter at top of tall petal: 3.10"
Diameter at top of short petal: 3.09"
Diameter at base of sunshade: 3.08"......

Thank you for sending the information. I see that there are posts showing options for this problem already. If you are still interested I will be beginning design today and maybe have my first prototype off to the printer later this week. This will be a much more economical solution and for you, if you are willing to test, you will get to keep a working prototype.

Tgbyrne

Thanks. If all else fails I know that I can fall back to this option. If I succeed I will have a very economical option.

Fotomacher Loc: Toronto

I have a E-M1mk1 and the 7-14mm Oly lens. Interested in your solution. Keep me posted.
The body is my secondary kit, my main squeeze is a Nikon D810.
Thanks.

jcboy3

[quote=Tgbyrne]

I am interested in what you come up with. I recommend you ensure that your adapter seals off light leaks from behind; that's always been an issue I had with adapting to petal lens hoods. I adapted my Cokin filter mount to the Panasonic 7-14, but I have to wrap a cloth around it to seal it. I use Cokin P filters (85mm). Unfortunately, they vignette on the Olympus below 9.5 mm.

What filter size are you designing for?

I would be willing to test, but I am leaving at the end of the week for 3 weeks in China. If you haven't straightened out the testing by then, contact me and I'll do it. But also, keep me in mind for your solution. I haven't been willing to invest in a solution for the Olympus, because it would require an expensive adapter and an upgrade to my filters (I have a bunch of 85mm, including the Tiffen long filters which cost a couple hundred each).

Good luck.

Tgbyrne

Thanks. I'll post my progress here. I just ordered my prototypes for the 8mm and the 7 to 14. We'll see how they come out. I may be crowdsourcing this to see how much interest there is.

Have a great trip.
Tom