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07-08-2008, 06:24 PM   #1
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Jelly Fish with FA 50 f/1.4

Yes, I know, FA 50 f/1.4 is not a macro, but I used a Cosina/Pentax/Phoenix 1:1 Matched macro adapter and pushed f/1.4 to f/2.8 for all of my shots in a dark aquarium. At first, I tried my default setting of f/2.8 in iso 400 but the resulting shutter speed too slow for motion in the jelly fish, perhaps my hand shake too, and I resolved to count on faster speed in f/1.4, f/1.6 and f/1.8 and work with a cleaner background on iso 200.



Pictures taken with K10D & Pentax FA 50 f/1.4
All are taken hand-held in iso 400 and 200.

#1
1/40 sec, f/2.8, 50mm, iso 400, 0 Ev


#2
1/6 sec, f/2.8, 50mm, iso 400, 0 Ev


#3
1/13 sec, f/2.8, 50mm, iso 400, 0 Ev


#4
1/30 sec, f/1.4, 50mm, iso 200, 0 Ev


#5
1/20 sec, f/1.4, 50mm, iso 200, 0 Ev


Jelly Fish complete Flickr Set




Last edited by hinman; 07-09-2008 at 10:26 AM.
07-08-2008, 06:52 PM   #2
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Like the last one a lot, amazing colors
07-08-2008, 10:45 PM   #3
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QuoteOriginally posted by bigben91682 Quote
Like the last one a lot, amazing colors
Thanks for the kind comments. Here are two more shots


#6
1/30 sec, f/1.4, 50mm, iso 200, 0 Ev


#7
Out of focus unfortunately,
this jelly fish has subtle colors on outer edges
and it is lost in the user error
1/8 sec, f/1.4, 50mm, iso 400, 0 Ev


#8
1/25 sec, f/1.8, 50mm, iso 200, 0 Ev


Jelly fish with Pentax FA 50 f/1.4



I wonder if a diffused internal flash or external flash in front of the glass in the aquarium will help with the shots. Thoughts and suggestions are very welcome.

Hin

Last edited by hinman; 07-11-2008 at 07:21 PM.
07-08-2008, 10:55 PM   #4
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Lovely shots. I have something similar which is the Vivitar +10 macro adapter which is similar to the 1:1 matched macro adapter found with various 100mm f3.5 1:2 macro lens. They are very good with prime lens^^

07-09-2008, 09:25 AM   #5
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QuoteOriginally posted by hinman Quote

I wonder if a diffused internal flash or external flash in front of the glass in the aquarium will help with the shots. Thoughts and suggestions are very welcome.

Hin
Id it o.k. to use flash in the Aquarium? If not, a biologist may come out and stomp out your guts.
07-09-2008, 09:49 AM   #6
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QuoteOriginally posted by Blue Quote
Id it o.k. to use flash in the Aquarium? If not, a biologist may come out and stomp out your guts.
Actually, I mean to ask if a diffused flash will work well with the glass in between the fish and the camera.

Thanks,
Hin
07-09-2008, 09:55 AM   #7
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QuoteOriginally posted by zeek10d Quote
Lovely shots. I have something similar which is the Vivitar +10 macro adapter which is similar to the 1:1 matched macro adapter found with various 100mm f3.5 1:2 macro lens. They are very good with prime lens^^
Thanks for the comments. So far, I find the Cosina 1:1 matched adapter very useful on my prime with FA 50 f/1.4. I think my adapter is similar to a 3+ to 4+ special diopter with double elements. I think my FA 50 f/1.4 close focus is about 1:6. With the adapter, I guess, it goes up to 1:3 in magnification.

What I like about the diopter approach are as follows:
  • Metering and AF stays on, this comes in very handy for the FA 50 f/1.4
  • Almost no addition of weight as compared to extension tubes or Vivitar/Kenko 2x macro adapter
  • IQ is not the best but very acceptable, there seems little loss of light as compared to 2 stop loss of light in 2x macro adapter and similar loss of light in extension tubes
  • Sharpness and detail in corner may degrade but results seems reasonable for the center

Last edited by hinman; 07-09-2008 at 10:40 AM.
07-09-2008, 10:01 AM   #8
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wow they are beautiful, Good job!

07-11-2008, 07:20 PM   #9
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QuoteOriginally posted by vizjerei Quote
wow they are beautiful, Good job!
Thank you!
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