I have read several references on forums to maze pattern artefacts appearing (usually on the right side of images) in RAW output from the G1. Mine seemed okay - until I started to use my Leica and Voigtlander lenses attached via a couple of Chinese adapters. Trying each of my lenses, this is what I found :
12 CV Ultrawide Heliar - Severe
16-18-21 WATE - Some
28 Elmarit - Quite Severe
35 Summicron ASPH - Some
50 CV Nokton - Little
75 Summarit - None
90 Summicron - None
Each was tested at f8 focused at infinity on the sky. Retesting my Elmarit at every aperture produced no discernable difference in artefacts.
I tested the 12mm lens attached vie scre and bayonet adapter - no difference. The kit 14-45 is fine, as is the 45-200. I also tested a 25mm Olympius pancake with the Pany adapter. No problem.
Has anybody else had a similar experience?
Here is an example of the arefacting (enlarged!). In Lightroom it starts to be visible on screen at 1:1 or greater enlargement.