A good old rule of thumb says for 900mm you'll need at least 1/900 sec. (for 35mm film). I guess this applies for APS format if you muliply by the crop factor of 1.5?
I can hand hold 300mm F4 lens, but actually - I'd rather use a monopod or a tripod. When I use my M* 4/300mm + an F 1.7 AF Adapter I get 510mm - on the *ist D this equals 765mm. I know I could NEVER hand hold this - I even have to use the timer to get shots like that sharp at 1/100 sec. on a sturdy tripod! I do think Robs shots are quite impressive! 340mm and 1/800 sec. can produce a "not shaken" image on the APS-C sized sensor (The Rule of Thumb would say "at least" 200 x 1.7 x 1.5 = that is 1/510sec. Jens Bladt mailto:[EMAIL PROTECTED] http://hjem.get2net.dk/bladt -----Oprindelig meddelelse----- Fra: Rob Studdert [mailto:[EMAIL PROTECTED] Sendt: 29. november 2004 23:44 Til: [EMAIL PROTECTED] Emne: Hand holding long lenses (Was PESO - Coming in for a landing) On 29 Nov 2004 at 23:01, Boris Liberman wrote: > 300x2x1.5 = 900 mm of focal length. So you can handhold this... Do > tell me how. I cannot handhold F 70-210 at 210 mm and 1/250 sec - the > shake is evident... I know, I know - I haven't been drinking coffee > ever since that post. And I drink just few cups of tea every day. Hi Boris, I'm not speaking for Christian but I think that you will find that practice helps a lot and from my experience after you have got good hand holding techniques well practised focus will be your worst enemy. I was shooting a lot over the weekend with my FA200/2.8 and 1.7TC on the *ist D always hand held and there were very few images which were ruined by camera shake particularly those shot at 1/800th or faster. The following shot was made using the lens combo above at a shutter speed of 1/800 @ f7.1 ISO200 http://home.swiftdsl.com.au/~distudio/temp/IMGP8884.jpg FF shot scaled to 25% http://home.swiftdsl.com.au/~distudio/temp/IMGP8884crop.jpg 100% crop Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
