What is the outer diameter of matte box?

The outer diameter of the matte box is 105mm.

Will it work with Sigma 18-50mm f/2.8 and Canon EF-S 18-200mm lens ?

Yes, this matte box will work with Sigma 18-50mm f/2.8 lens.

Will it work with 5d/7d with battery grip?

This mattebox cannot be used with Canon 5d/7d with battery grip as such but we have the option of height riser incase required.

Are the filter trays rotating?

No, the filter trays are non-rotating in this mattebox.

Which lenses it will work with ?

It will work with all photo & cinema standard and wide angle lenses upto 28mm.

Will it work with gh4 camera ?

Yes, this matte box will work with GH4 camera with any photo & cinema standard and wide angle lenses upto 28mm.

What is the maximum lens dia, the knickers will fit to ?

The knickers will fit to the lenses with upto 105mm diameter.

What is the material of matte box?

The mattebox hood is made up of strong plastic. Flags & height adjuster are aluminum made and knicker is fabric.

Which filters I can use with it?

You can use 4x4 filters with this mattebox.

Is it returnable for a full refund if it doesn't meet my expectations upon delivery?

Yes, absolutely. We always backup our sales. In case, you don't like the product, we take it back within 30 days and you get a 100% refund.

What is the warranty?

We provide 1year warranty from the date of purchase. Items which are covered by the warranty period will be replaced at no cost to the customer. Replacement parts of the product will be provided at nominal cost (covering the cost price of the replacement parts only) to the customers after the Warranty Period has expired.