Hence the multiplier is 'how much do I need to multiply aperture or focal length to get the equivalent'. Here is the conversion table we came up with.īear in mind that the table below uses the IQ180 as the baseline. Given this, the ratio of the short sides of the IQ180 (40.4mm) vs the short side of 10x8 (196mm) gives a ratio of 4.6:1 - these calculations were made for all of the cameras and as we wanted to use the Rodenstock Digaron W lenses, we only had 40mm, 50mm and 70mm lenses to choose from. We made a presumption that most people interested in the results would probably be thinking about moving from 4x5 to digital and so we decided to settle on that as the aspect ratio for our conversions. Our next job was to select a range of lenses that would give us a close enough focal length match. The Alpa and lenses were loaned to us by Paula of Linhof Studio the tilt shift lenses were loaned by Lenses for Hire and the D3X was contributed and operated by John Robinson. We would have liked to have tested the IQ180 on the Linhof Techno as well but the platform used (any of them) didn’t contribute a great deal of difference to the sharpness of the result under ideal conditions so we don’t think this would have produced vastly different results. We started looking at which cameras to test and distilled the potential candidates to the following Film Cameras These were very helpful in picking the right approach.įollowing the test, we talked to other photographers who use large format film, high-end digital or both, including Hans Strand, Andrew Nadolski & David Ward We also talked about the project on a few online forums, including the ‘Large Format Photography’ forum, the ‘Luminous Landscape’ forum. Chris Ireland, Phase One’s representative in the North East of England.Dav Thomas, who started shooting digital DSLR’s but moved onto film and eventually large format.Joe Cornish, who owns a Phase One P45 but has spent much of his career shooting transparencies on 4x5 film.We followed up the research on the first article by talking to a few different photographers in person in order to get their input on what a thorough test would look like, these subsequently helped with the actual running of the test (so a massive thanks to them!). If you do, please visit the luminous landscape page IQ180 vs 8x10 and the follow up posted in ‘On Landscape’ here. Although the test below stands alone, you may wish to read the previous test and our response to it. This test originally came about as a response to a previous test on Luminous Landscape.

Luminous landscape forum