[Crab spider and Dance Fly DINNER]

Joined
Sep 16, 2005
Messages
1,626
Location
South Africa
Caught this fella busy with dinner in our daisy bush.
Dont'cha just love that camoflauge!?

Sigma 18-50mm f/3.5-5.6 lens @ 24mm, reversed onto Kenko DG Extension Tubes (68mm)

EXIF for most is unknown, as reversing removes the aperture and lens f/l etc ;)
Setup was 1/100s, Aperture operated by lever, SB-600 off camera via SC-29 TTL cord, desklamp for lighting.
Reversed lens attached to face of tubes using rubber bands :D

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The dance fly was approx 2mm in size.

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Below; Sigma @ 50mm just with 68mm tubes;
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Below; Sigma 105mm f/2.8 macro;
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Last one, Sigma 105mm f/2.8 with 68mm extension, and reversed Sigma 18-50 @ 24mm;
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Anyone know how to calculate reproduction ratio please?
Thanks
 
Joined
Feb 9, 2005
Messages
1,524
Location
Penryn Cornwall England
Anyone know how to calculate reproduction ratio please?
I am going to 'take a flyer ' at this.

Judging from the size of the image and the depth of field I think that they range from just less than 1:1 (life size) to 1.5:1 through to about 2.5 or 3:1.
The problem is that once you reverse a lens on a zoom the calculations become rather complicated especially with digital.

I hope this helps.

Bob F.
 
Joined
Sep 16, 2005
Messages
1,626
Location
South Africa
thanks bob, the "zoom" was the reversed one @ 24mm. the fixed was 105mm. tubes were 68mm.
macro lens (105) was fully extended to 1:1 already.
any better now?
 

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