Hama 49 mm, one coating layer per side, 3.4 mm frame
Eight euros for a 49 mm colour-neutral UV filter with one coating per side, a 3.4 mm metal frame and a box — and a front thread that still takes a hood or a cap.
- Thread size
- 49 mm, in the title — the smallest on this shelf, where the three others are 67 mm. Forty-nine millimetres is the thread of small primes and older kit lenses, and the buying advice above prefers the largest thread in the bag with step rings below it. This is the filter bought for one small lens
- Glass
- Optical glass in a black metal frame, in the third bullet, described as colour-neutral. No glass origin is named, where the 11 € K&F and the 13 € PROfezzion both claim Japanese optical glass
- Coating description
- COUNTED, and precisely: one coating layer on EACH SIDE — a two-fold coating, as the title has it. That is the lowest count on this shelf, against twelve layers on the PROfezzion and eighteen on the K&F, and it is stated plainly rather than dressed up
- Frame thickness
- 3.4 mm, in the fifth bullet, described as a flat mount. Only two pages on this shelf publish a frame figure; the PROfezzion is 3 mm and the two others publish none. Thickness is what decides whether a wide lens sees the ring
- Material
- A black metal frame around a glass lens, in the third bullet. Black inside the frame is what stops light bouncing between filter and lens, and the colour is worth the mention
- Front thread provision
- YES, and it is the only page here that spells out what the front thread is for: the fourth bullet says further filters, a lens hood or a lens cap screw straight on. A filter without a front thread ends the stack; this one does not
- Stated transmission figure
- NOT PUBLISHED. The 13 € PROfezzion is the only filter on this shelf to give one, at 99.5 per cent minimum. With one coating layer per side, the loss here will be larger, and the page does not say by how much
- Amazon reference
- B00006JEAY (same reference on 6 Amazon marketplaces)
- EAN
- 4007249700490
- A published 3.4 mm frame and a counted coating — one layer per side
- A front thread stated to take another filter, a hood or a cap
- One coating layer per side, against twelve and eighteen elsewhere on this shelf
Best for: A small 49 mm prime or an older kit lens that needs a lid over the front element, where a hood or a second filter still has to go on top.