Using the 1.4 extender

artyman · 4th of April 2009 (Sat)

Following on from my trip out last week using the Sigma 1.4 extender on the 150-500 I wasn't fully satisfied with the quality of the shots, so experimented today in the garden whilst having my lunch to see if I could improve the quality by stopping down a bit more.

Sadly today no birds chose to join me, perhaps they don't like ham sandwiches so I had to make do with this fly, OK at least it's got wings.

The first shot is the full frame and the second a 100% crop. Shot at 1/1000 f11 ISO-800 and manual focus obviously. I think the quality is quite acceptable when you think that this fly was about 13 ft from me. I hope this is helpful for anyone considering the Sigma lens or the 1.4 extender.

[img]http://************/djz7kf/Img_5515.jpg[/img]

[img]http://************/djz7kf/Img_5515cx.jpg[/img]

LordBrian · 4th of April 2009 (Sat)

How do you find the manual focus. I am not sure I ever hit the sweet spot especially on moving targets.

artyman · 4th of April 2009 (Sat)

I don't find manual focus a problem, in fact it seems easier with the extender attached than without it, as the depth of field is so small, as you are at full aperture whilst you are focusing. Iv'e only had AF since moving to digital just over two years ago so haven't completely lost the ability to manual focus and I find I stand a better chance with BIF using manual.

Tom Reichner · 5th of April 2009 (Sun)

Quote:

Originally Posted by artyman

. . . and I find I stand a better chance with BIF using manual.

Even when they're flying right at you?

artyman · 5th of April 2009 (Sun)

Never happens, I think they don't like the look of me

4th of April 2009 (Sat)	#1
artyman Cream of the Crop Join Date: Feb 2009 Location: Hampshire UK Posts: 13,619 IMAGE EDITING OK	Using the 1.4 extender Following on from my trip out last week using the Sigma 1.4 extender on the 150-500 I wasn't fully satisfied with the quality of the shots, so experimented today in the garden whilst having my lunch to see if I could improve the quality by stopping down a bit more. Sadly today no birds chose to join me, perhaps they don't like ham sandwiches so I had to make do with this fly, OK at least it's got wings. The first shot is the full frame and the second a 100% crop. Shot at 1/1000 f11 ISO-800 and manual focus obviously. I think the quality is quite acceptable when you think that this fly was about 13 ft from me. I hope this is helpful for anyone considering the Sigma lens or the 1.4 extender. [img]http://**********/djz7kf/Img_5515.jpg[/img] [img]http://**********/djz7kf/Img_5515cx.jpg[/img] __________________ Art that takes you there. http://www.artyman.co.uk Ken Canon 7D, 350D, 15-85, 18-55, 75-300, Cosina 100 Macro, Sigma 120-300

4th of April 2009 (Sat)	#2
LordBrian Senior Member Join Date: Jan 2009 Location: Surrey, UK Posts: 1,129 IMAGE EDITING OK	Re: Using the 1.4 extender How do you find the manual focus. I am not sure I ever hit the sweet spot especially on moving targets. __________________ Canon 7D \| EF 100-400mm L my favourite bits of kit http://blog.depicus.com - Flickr - Vimeo - 500px

4th of April 2009 (Sat)	#3
artyman Cream of the Crop Join Date: Feb 2009 Location: Hampshire UK Posts: 13,619 IMAGE EDITING OK	Re: Using the 1.4 extender I don't find manual focus a problem, in fact it seems easier with the extender attached than without it, as the depth of field is so small, as you are at full aperture whilst you are focusing. Iv'e only had AF since moving to digital just over two years ago so haven't completely lost the ability to manual focus and I find I stand a better chance with BIF using manual. __________________ Art that takes you there. http://www.artyman.co.uk Ken Canon 7D, 350D, 15-85, 18-55, 75-300, Cosina 100 Macro, Sigma 120-300

5th of April 2009 (Sun)	#5
artyman Cream of the Crop Join Date: Feb 2009 Location: Hampshire UK Posts: 13,619 IMAGE EDITING OK	Re: Using the 1.4 extender Never happens, I think they don't like the look of me __________________ Art that takes you there. http://www.artyman.co.uk Ken Canon 7D, 350D, 15-85, 18-55, 75-300, Cosina 100 Macro, Sigma 120-300

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