Pentax Asahi Takumar SMC lens infinity focus with Canon 600D dslr

[alacant]

On 15/06/2022 at 17:26, Elp said:

One stop down

Hi

Leave the diaphragm open and control the f ratio using a 58mm to 36mm step-down ring(s). That will help control the diffraction spikes and the irregular colour.

Edited June 16, 2022 by alacant

[Elp]

I'll try that, I'm already partially stopping down by using an m58 to m48 step down ring so I can use a filter on the front of the lens.

[Elp]

Here's the first project result, image has been processed to reduce the red halos around the stars:

 

Final image here: