All Forum Comments
Comment by amilner posted on Pentax WR lenses at 11/06/2009 - 22:25
Neither Minolta or Sony have ever done much over 300mm.
Comment by amilner posted on The K7 price is making me want to buy the K20D !! at 04/06/2009 - 17:09
Moral - buy thin filters for this lens!
Comment by amilner posted on Pentax 17-70 & filters at 30/05/2009 - 11:04
f numbers, or aperture values, are a measurement of the size of the hole that the light passes through in the rear of a lens, relative to the focal length of the lens.
If it was the actual size of the rear opening a 300 2.8 would be a bit tough to produce! Hence the limiting factor is the diameter of the front element. If you look through the front of a long, wide aperture lens you will find the it appears to be the same width all the way through, even though physically it gets narrower.
[edited for typos]
Comment by amilner posted on New roadmap? at 27/05/2009 - 10:26
As Beakynet says all other bodies which have program or shutter priority mode (super A onwards) can use the lens but only in program or shutter priority mode as there is no way to set the aperture. This also means no manual mode.
Comment by amilner posted on New roadmap? at 26/05/2009 - 07:53
Comment by amilner posted on Are you going to buy the K-7 at 21/05/2009 - 14:57
Comment by amilner posted on Pentax UK website at 21/05/2009 - 14:06
One can but hope
You have to admit this slow leaking has created a lot of interest among enthusiasts at least!
Comment by amilner posted on K7D announced in US? at 15/05/2009 - 14:05
Comment by amilner posted on convert slides to digital at 09/05/2009 - 10:17
The 200 f4, however, has a fairly modest reputation. I had one but there was no real advantage over a zoom so it rarely got used.
Comment by amilner posted on SMC 135 f2.8 at 04/05/2009 - 16:12

