The test for every addition is whether it fits something you already have, measured on a published figure.
Let one filter diameter govern the others
The thread is cut into the front of each lens and the number is printed there. Choose the largest you own as the working size and match filters to it; rings adapt the smaller lenses. What no listing publishes is what a ring costs optically at the corners of a wide-angle lens, so that is the one place to keep a dedicated filter.
Keep one plate profile across every support
Plates and clamps are where kits fragment. The widely copied dovetail profile is accepted by most heads and published by nobody — there is no document two makers can be measured against, so widths and safety lips vary. Two titles here name it. The practical rule is to standardise on one profile and buy plates for every body and long lens, so any of them drops onto any support.
Remember there are only two screw sizes
The smaller sits under a camera, a monitor and most small clamps — eight titles here print it. The larger joins legs to head and appears on stands, printed in three. A bushing changes between them and changes nothing else. Knowing this is what stops a purchase failing to attach.
Buy light before you buy another body
Eight titles here publish a colour temperature and four a rendering index. One panel or one flash that matches the sources already in the room does more for a picture than a second camera, and both figures are comparable between products in a way no body specification is.
Add carrying last, and size it to the finished kit
A bag bought for one camera and one lens is a bag replaced within a year. This catalogue keeps backpacks and hard cases as separate families because they answer different journeys, and the published figure in both cases is internal dimensions — measured against the kit you expect to own, not the one you own today.
What people ask before they commit
What is the first thing to add after the camera and lens?
Whatever the pictures you actually take run out of. If frames are blurred indoors, that is light — a wider aperture or a support. If subjects are too small, it is reach. Buying to fix a complaint you have met beats buying to complete a list somebody else wrote.
How do I avoid buying filters twice?
Buy for the largest thread you own and step down with rings, accepting that a step-up ring sits further forward and can vignette on a wide-angle lens. The alternative is one set per diameter, and with three diameters across four lenses in this catalogue that adds up quickly.
Last reviewed 13 September 2026