Steve'sDigicams

aaltenburger · Jul 29, 2004, 9:57 PM

Had a number of requests for more pics of stacking. This was taken w/ a 10D, Sigma 120-300 f/2.8, and stacked 1.4 and 2.0x Sigma TCs. 1x sharpen in PS w/ a slight crop, that's it.

wvyankeegurl · Jul 30, 2004, 12:45 AM

Nice shots !

Love them ..... very sharp.

aladyforty · Jul 30, 2004, 8:27 AM

great shots, nice and crisp.

aaltenburger · Jul 30, 2004, 9:01 AM

It was fun to shoot these. My focus point was the very top of the hill. That first picture is just a little soft. If you look, he's just a little past the crest of the hill. Considering the speed of these things, even head on, it wasn't easy to get a shot that was nice and crisp. The stacking kind of compunds thesharpnessissue as well. Already looking forward to next year.

cowboy43 · Jul 31, 2004, 3:16 PM

Wow nice shots I guess I did not know you cold stack TC's I have one tamron 2x. When you stack two do you loose twice the stops? Thanks .... Dale

aaltenburger · Jul 31, 2004, 6:42 PM

The 120-300 f/2.8 becomes an 840mm f/8 or so. For me it works. Am I going to get nice sharp, crisp pictures. Nope. But, it's going to get me shots I never would have gotten in the first place. Some of them are pretty sharp,but most of them need a little PS sharpening. I'm quite content doing that.

NHL · Aug 1, 2004, 9:08 AM

It looks like this lens is a keeper:

1. No one makes a 120-300 f/2.8 zoom
2. The EF 300 f/2.8 L is slighly better, but then it costs slighly more
3. ... the Sigma 100-300mm F4 EX IF HSM is also slighly better, but it costs a lot less :-):-):-)

cowboy43 · Aug 1, 2004, 2:35 PM

Sharpening is no problem, I am on monopod most of the time any way, what will the factor mm be on a nikon 80-200 f2.8 d with 2 2x tamron converters? Thanks Dale

www.pbase.com/cowboy43

aaltenburger · Aug 1, 2004, 3:32 PM

I'm not sure if you can stack 2 - 2x's together. One of the elements might stick out too much. Something to check on. With your 200, you'd be at 800mm and about f/11-12.

cowboy43 · Aug 1, 2004, 6:04 PM

Ok thanks I will check into that...What would stick out? The elements? are they different on a 1.4x?

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Jul 29, 2004, 9:57 PM	#1
aaltenburger Senior Member Join Date: Dec 2003 Posts: 165	Had a number of requests for more pics of stacking. This was taken w/ a 10D, Sigma 120-300 f/2.8, and stacked 1.4 and 2.0x Sigma TCs. 1x sharpen in PS w/ a slight crop, that's it.

Jul 30, 2004, 12:45 AM	#2
wvyankeegurl Senior Member Join Date: Jun 2002 Posts: 356	Nice shots ! Love them ..... very sharp.

Jul 30, 2004, 8:27 AM	#3
aladyforty Senior Member Join Date: Jan 2004 Posts: 6,964	great shots, nice and crisp.

Jul 30, 2004, 9:01 AM	#4
aaltenburger Senior Member Join Date: Dec 2003 Posts: 165	It was fun to shoot these. My focus point was the very top of the hill. That first picture is just a little soft. If you look, he's just a little past the crest of the hill. Considering the speed of these things, even head on, it wasn't easy to get a shot that was nice and crisp. The stacking kind of compunds thesharpnessissue as well. Already looking forward to next year.

Jul 31, 2004, 3:16 PM	#5
cowboy43 Senior Member Join Date: Feb 2003 Posts: 923	Wow nice shots I guess I did not know you cold stack TC's I have one tamron 2x. When you stack two do you loose twice the stops? Thanks .... Dale

Jul 31, 2004, 6:42 PM	#6
aaltenburger Senior Member Join Date: Dec 2003 Posts: 165	The 120-300 f/2.8 becomes an 840mm f/8 or so. For me it works. Am I going to get nice sharp, crisp pictures. Nope. But, it's going to get me shots I never would have gotten in the first place. Some of them are pretty sharp,but most of them need a little PS sharpening. I'm quite content doing that.

Aug 1, 2004, 9:08 AM	#7
NHL Senior Member Join Date: Jun 2002 Location: 39.18776, -77.311353333333 Posts: 11,599	It looks like this lens is a keeper: 1. No one makes a 120-300 f/2.8 zoom 2. The EF 300 f/2.8 L is slighly better, but then it costs slighly more 3. ... the Sigma 100-300mm F4 EX IF HSM is also slighly better, but it costs a lot less :-):-):-)

Aug 1, 2004, 2:35 PM	#8
cowboy43 Senior Member Join Date: Feb 2003 Posts: 923	Sharpening is no problem, I am on monopod most of the time any way, what will the factor mm be on a nikon 80-200 f2.8 d with 2 2x tamron converters? Thanks Dale www.pbase.com/cowboy43

Aug 1, 2004, 3:32 PM	#9
aaltenburger Senior Member Join Date: Dec 2003 Posts: 165	I'm not sure if you can stack 2 - 2x's together. One of the elements might stick out too much. Something to check on. With your 200, you'd be at 800mm and about f/11-12.

Aug 1, 2004, 6:04 PM	#10
cowboy43 Senior Member Join Date: Feb 2003 Posts: 923	Ok thanks I will check into that...What would stick out? The elements? are they different on a 1.4x?