The photo below of Molly the dog shows the very subtle effect the K&F CONCEPT 72mm Gold Diffusion 1/4 Filter creates, with the warm Winter sunlight given a golden boost the filter, adding richer tones to the autumnal colours of both grass and earth around her, having been around cameras since the film only days, it is very reminiscent of the Fuji colour film I preferred. (no, don't ask me the name of it, this was 50 years ago!)

Hopefully the 2 shots of the Mine wheel serves to illustrate just how there is a slight shift toward gold when using the filter - the first is 'normal', 2nd using the filter. Sadly my normal provider of portraiture (grand daughter) is under 18, so I couldn't enlist her as talent for this review...

The K&F CONCEPT 72mm Gold Diffusion 1/4 Filter is spattered, quite evenly, with flecks of gold (I wonder if it is actually gold?), it doesn't noticably affect exposure, so less than 1/3 stop, nor does it add any unexpected colour cast to the image. Yes, the image has a soft & golden glow, that warms up all colours slightly, but not unnaturally.

I've not taken any video footage with it on the camera yet, but hope to add a few single frame grabs a little later.

The K&F CONCEPT 72mm Gold Diffusion 1/4 Filter arrives in a hard plastic case for protection and is provided with a microfiber cleaning cloth. The screw threads are cleanly cut and attached to both my lens and stepping rings smoothly,

Build quality is exactly as expected with a premium priced filter, both in the coatings on the glass and the 'feel' of the metal ring. (premium in relation to K&F CONCEPT's good value ranges)

I really like the 'vintage' film feel the filter creates, so no issue giving the 5 star rating.