Re: PAW: sparrows
they weren't making a lot of sounds when i was watching them. i'm still learning about birding, so i would have to sit and study them as opposed to concentrating on taking the photos. it took about an hour of standing beside the car before they got comfortable enough to come as close as they did. staying in the car, they would have been on the wrong end of the car, out the back and i wouldn't have been able to see them much. tripod - Gitzo 1325 CF with the 1377M ball head and dovetail QR adapter for my Arca Swiss lens plate. the combination is about the right size. i wouldn't go any heavier in load without attaching a stablizing weight to the center column. the ball head had its tension up but not locked so i could move it fairly quickly but it would stay more or less where i let go of it. i think a Wimberly would make things a lot easier. Herb... - Original Message - From: "Mark Cassino" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, March 15, 2004 8:57 AM Subject: Re: PAW: sparrows > Nice shots, Herb - they do look like song sparrows. Did they say "maids > maids put on your tea kettle kettle" ? > > Tripod or bean bag? Or hand held?
Re: PAW: sparrows
several reasons for the softness: lens isn't super sharp, 2X extender makes it worse, shooting wide open is worse, and 1/500s shutter speed, even on a good tripod, is marginal at that much magnification when you have to be holding the camera and aiming it. the ball head couldn't be tight as i had to track the rapidly moving birds. mostly though, i think it is the converter. Herb - Original Message - From: "Boros Attila" <[EMAIL PROTECTED]> To: "Herb Chong" <[EMAIL PROTECTED]> Sent: Monday, March 15, 2004 3:56 AM Subject: Re: PAW: sparrows > I like that shot very much! However it is not crisp sharp, I think > that doesn't hurt, on the contrary, it accentuates the warm feeling of > the nest. Big kudos for that shot!
Re: PAW: sparrows
Hello Herb, I like that shot very much! However it is not crisp sharp, I think that doesn't hurt, on the contrary, it accentuates the warm feeling of the nest. Big kudos for that shot! Sunday, March 14, 2004, 8:51:38 PM, you wrote: HC> taken on the *istD with a Sigma 50-500 and Sigma 2X extender at 500mm wide HC> open and then cropped to the 50% center portion. equivalent FOV to a 1500mm HC> lens on a 35mm film body. Man, I can only dream of something like that equipment... Attila
Re: PAW: sparrows
worse, much worse. Herb... - Original Message - From: "Rob Studdert" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, March 14, 2004 6:38 PM Subject: Re: PAW: sparrows > It's sharp enough to be usefull in the centre but the strange bokeh and > deterioration of contrast towards the edges is distracting, what did it look > beyond the area that we can see?
Re: PAW: sparrows
On 14 Mar 2004 at 13:51, Herb Chong wrote: > i believe these are Song Sparrows, common throughout the US and Canada. they are > very variable so the birds markings don't exactly match any of the recognition > pictures i have, but they are close. > > http://users.bestweb.net/~hchong/temp/ > > taken on the *istD with a Sigma 50-500 and Sigma 2X extender at 500mm wide > open and then cropped to the 50% center portion. equivalent FOV to a 1500mm lens > on a 35mm film body. useful Hi Herb, It's sharp enough to be usefull in the centre but the strange bokeh and deterioration of contrast towards the edges is distracting, what did it look beyond the area that we can see? 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
Re: PAW: sparrows
Nice shot Herb.Good colours and clarity for a "" un "" 1500 Dave > i believe these are Song Sparrows, common throughout the US and Canada. they > are very variable so the birds markings don't exactly match any of the > recognition pictures i have, but they are close. > > http://users.bestweb.net/~hchong/temp/ > > taken on the *istD with a Sigma 50-500 and Sigma 2X extender at 500mm wide > open and then cropped to the 50% center portion. equivalent FOV to a 1500mm > lens on a 35mm film body. > > Herb... > >
Re: PAW: sparrows
1500mm lens FOV though. 3000mm final. imagine carrying that one around. Herb... - Original Message - From: "Boris Liberman" <[EMAIL PROTECTED]> To: "Herb Chong" <[EMAIL PROTECTED]> Sent: Sunday, March 14, 2004 2:21 PM Subject: Re: PAW: sparrows > Hi! > > I am half mathematician by education. So here is my math: > > Sigma 50-500 at 500 mm plus Sigma 2x extender = 1000 mm. Crop of 50% > center portion means like 2x more = 2000 mm. Roughly 1.5 *istD factor > = 3000 mm > > HC> taken on the *istD with a Sigma 50-500 and Sigma 2X extender at 500mm wide > HC> open and then cropped to the 50% center portion. equivalent FOV to a 1500mm > HC> lens on a 35mm film body. > > Right?
Re: PAW: sparrows
Hi! I am half mathematician by education. So here is my math: Sigma 50-500 at 500 mm plus Sigma 2x extender = 1000 mm. Crop of 50% center portion means like 2x more = 2000 mm. Roughly 1.5 *istD factor = 3000 mm HC> taken on the *istD with a Sigma 50-500 and Sigma 2X extender at 500mm wide HC> open and then cropped to the 50% center portion. equivalent FOV to a 1500mm HC> lens on a 35mm film body. Right? Boris
