On Mar 26, 2007, at 8:26 AM, Tim Øsleby wrote:
> Most likely I'll never buy one, but interesting reading Godfrey. > > One thing puzzled my mind >> - Using a tripod with this wide a lens is essential to getting the >> best resolution. > Why? Could you elaborate on this point? > I have been thinking the other way around, that long lenses are > those who > needs support most. So some input on this would be nice. At both ends of the spectrum, ultra wide and extreme telephoto, you need to pay particular attention to a sturdy support to obtain the best possible results. Since I was focusing on the DA14, I was not making reference to longer focal length lenses, that all. Long lenses need a sturdy tripod to achieve best results due to the issues involved with camera motion and magnification. Given a stable platform, long lens resolution is ultimately limited by the effects of DoF and atmospheric haze. Once at the limit of the atmosphere and focus depth, how well you focus and how much DoF you can get are the primary constraints on detail resolution, not the resolution capabilities of the recording medium. Ultra wide lenses need a sturdy tripod to achieve their best resolution for similar reasons, but since you usually look for very finely detailed images over a much wider span of DoF with an ultrawide, ultimate resolution of the lens and recording medium usually make a larger influence on the image quality than DoF and atmospheric haze. In truth, you need a sturdy tripod to get the best out of any lens, but the kinds of scenes more normally associated with fast wide to portrait tele lenses are not generally as prone to be the highly detailed scenes that ultra wide lenses are used for with the same frequency. Of course, there are lots of occasions where hand-held is the only way to get the picture ... but I never delude myself that *any* hand-held exposure will reach the ultimate resolution capabilities of a lens/camera. Godfreyu -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
