|
The reason for using an external aperture mask is so that you can still shoot at f/2.8 (convenience of speed) without attaining diffraction spikes in the process.
Essentially, you just need to use some step down rings screwed in succession to make a mask.
The process Neale alluded to with stopping a lens down goes like this:
1. With the lens on the DSLR
2. Set your aperture as you normally would
3. Press the Depth-of-Field Preview button (little button near the lens release mechanism button)
4. Whilst depressing the DoFP button, remove the lens
The aperture is then set at whatever value you had it at on the DSLR
H
|