Update on TCs for 85 mm tilt/shift lens.

[Roland Vink]

Increasing magnification decreases coverage. In other words, as magnification goes up, you photograph a smaller area.

[Jack Dahlgren]

I always considered coverage as how large the image circle is and therefore how much of the recording media was covered, a habit from large format where you want more coverage to allow tilting and shifting. I thought since this was about a TS lens that it was similar context.

Same idea,but just backwards

[Birna Rørslett]

Increasing magnification decreases coverage. In other words, as magnification goes up, you photograph a smaller area.

One of the reasons why having a larger format might be advantageous. In the film days, I standardised on 6x9 cm format for anything 3X and larger in magnification. This allowed sufficient coverage for most of the nature subjects I dealt with at that time, whilst adapting suitable lenses was easy.

When magnification exceeds 1:1 life-size, the movements required for tilting the plane of focus get progressively greater. Thus having an oversized image circle came in handy.