Formatt Hitech Firecrest Ultra Soft Edge Reverse Grad 1.2 (100x150mm) lens mount_Leica R this one has yellowed glass:

this one has yellowed glass: Yes

it extends to 180cm

but you do get true through-the-lens viewing and spotmetering

The Vivitar 135mm f2

Please note that this is a pre-AI lens and that compatibility with later cameras will vary

Formatt Hitech Firecrest Ultra Soft Edge Reverse Grad 1.2 (100x150mm) lens mount_Leica R this one has yellowed glass:The Formatt Hitech Soft Edge Reverse Grad 1. 2 is a specialized filter designed for shooting sunrises and sunsets, with a hard edge style transition at the centre, but a gradual density fade out towards the top. This one has a 4 stop maximum density at its centre point. Designed to fit in standard 100mm filter holders (sold separately)