Hi James, I think he's talking about 4/3 sensor used by panasonic and olympus. As for your P30 back, it has a crop factor of 1.3 so the viewing angle of a 40mm lens is actually 52mm. Also PhaseOne does not recommend lenses wider than 40mm (before Factoring) as they cause color fringing on the edges of the sensor. With that in mind an SWC or a 30mm is out of the question. 40mm(52mm) 50mm(65mm) 60mm(78mm) 80mm(104mm) 100mm(130mm) 120mm(156mm) 150mm(195mm) 180mm(234mm). Taking the crop factor into consideration I'd start with a 50, 80 and a 120 then add a 40 and a 180. Once you get used to the quality of a digital back you'll never go back to 35mm gear for anything serious. I got hooked on my old kodak back (16Mp) traded up to a P25 and really got addicted, Now I've got a H3d39 and prefer it to my Nikon D3. Your going to see a big difference even in an 8x10 print. Franc ----- Original Message ----- From: James To: hasselblad@xxxxxxxxxxxxx Sent: Wednesday, January 26, 2011 12:42 PM Subject: [HUG ] Re: VS: Re: AW: Re: It's a sad Hasselblad day........ When you say 4/3 what do you mean by that, i have notice that a few times ------------------------------------------------------------------------------ From: Richard Man <richard@xxxxxxxxxxxxxx> To: hasselblad@xxxxxxxxxxxxx Sent: Wed, January 26, 2011 10:38:52 AM Subject: [HUG ] Re: VS: Re: AW: Re: It's a sad Hasselblad day........ The XPan (double width 35mm panoramic) have only 3 lens, so the choice is made for you. I use them in the following frequency: 45mm - 60% (similar to ~24mm in 35mm FOV but crop to 24x65 ratio) 30mm - 20% (similar to ~18mm but crop to ...) 90mm - 20% (similar to ~45mm ...) On the Leica, I use 35mm probably 70% of the time, 50mm 20%, and 75/85 for 10% but really mainly for portrait there. On the 4/3, I use it mainly for events, so the needs are drastically different. I will guess that I will use a 35mm equivalent lens the most, which for the P30, according to the Capture free's XLS worksheet, would be a 45mm lens. Hence my original thinking of returning the 60mm and get a 50mm Distagon instead (found the worksheet after I bought the lens :-) ) On Wed, Jan 26, 2011 at 8:23 AM, Q.G. de Bakker <qnu@xxxxxxxxxx> wrote: Richard Man wrote: Well, my main problem is that I have no reference for shooting with the P30. My main gear has been XPan for fine arts, 4/3 for events and Leica for everything else. The P30 is going to be my landscape camera as I want more dynamic range in the B&W photos. Chances are I will settle on a 3-lens kits, as I have with the other cameras. The trick is "which 3 lens?" What focal lengths would you pick for the other cameras? ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there. -- // richard <http://www.imagecraft.com/> // icc blog: <http://imagecraft.com/blog> // photo blog: <http://www.5pmlight.com> [ For technical support on ImageCraft products, please include all previous replies in your msgs. ]