Shield Bug


Photo Information
Shield on runner bean leaf. Taken with Pentax 200mm + 1.7 Adapter + 1.4 Adapter, increasing effective focal length considerably and Pentax Ring Flash, mounted on a Mono-pod. With such magnification it was it was necessary to take many shots to get one with an image in in focus. I had read a in a close-up Photography book that we should not stack converters/adapters; so I had to try it!
22/01/2018 - 01:24Photon
CategoryMacro
Shutter Speed1/180
Aperturef/22
LensN/A
ISO640
Focal Length500mm

go4IT

Link Posted 22/01/2018 - 03:38
Lovely result, given your use of two adapters. I sssume that at the time of taking a given shot, you didnít know if it was in focus or not???

GIULIO57

Link Posted 22/01/2018 - 08:35
Nice
PPG

davidwozhere

Link Posted 23/01/2018 - 00:36
Well, it worked ! The detail of the thing's eyes is very good. You don't often get that with shield bugs.
Have you tried 'catch in focus' with this sort of problem shot? I find it works but when it suddenly goes off it often makes me jump with surprise! You could also try using an 'empty lens' as a full function extension tube (see my peppercon shot earlier)
Both the *istDS and the K5 are incurably addicted to old glass

My page on Photocrowd - link

leep

Link Posted 24/01/2018 - 13:12
Orange eyes and lots of green

Photon

Link Posted 24/01/2018 - 22:44
Quote:

go4IT wrote:
Lovely result, given your use of two adapters. I sssume that at the time of taking a given shot, you didnít know if it was in focus or not???

Yes, it was a case of looking at the image shots after the event.

davidwozhere wrote:
Well, it worked ! The detail of the thing's eyes is very good. You don't often get that with shield bugs.
Have you tried 'catch in focus' with this sort of problem shot? I find it works but when it suddenly goes off it often makes me jump with surprise! You could also try using an 'empty lens' as a full function extension tube (see my peppercon shot earlier)

Thank you for the information, I had no knowledge of 'Catch-In-Focus' till reading your comment! and further searching, I will have to give it a try. Last year I took the lens elements out of an old Pentax Auto 50mm 'A' setting manual lens, not for the extension tube effect but I was experimenting with placing it and it's Auto diaphragm behind third party lenses (TPL) so that I could manually focus at wide open apertures then close my Auto Diaphragm Coupling (ADC) [behind the TPL] automatically from the camera shutter button to take the shot at small apertures and fire the flash at the required instant. After transposition of the Focal length formulae, I conclude that the resultant fstop = [FL (of TPL) x fstop of ADC]/FL of ADC.
My previous fly shot was taken with 200mm Macro lens with 1.7 Adapter and 65mm auto extension tube.https://www.pentaxuser.com/images/gallery/2015/12/large/too-fly-for-me_1449267256.jpg
The problem I have with reversing lenses is that the working distance is too short for live subjects.
All five minute jobs take a minimum of eight hours!
Last Edited by Photon on 24/01/2018 - 22:45
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