First images with 5D

[dmoss 0]

Just returned from Little Cayman and my first trip with the Canon 5D. My initial impression was how pleasing the 'blues' were right out of the camera. Also how lighting a full frame wide angle image is quite different than lighting WA with the 20D. I really enjoyed the larger viewfinder image. The 5D seemed to focus much quicker as well. I spent some time with the Sigma 150 macro which, as others have reported, will try your patience. I concentrated primarily on wide angle and playing with sunballs using the ISO 50 extension. I still have things to learn, but feel I'm getting there. Any constructive criticism is welcome.

[herbko 0]

Hi David,

 

Looks like you're off to a good start. THe sunballs look a little over exposed to me. Are you shooting raw? If so, you can probably get the sunballs to look better with a little WB and exposure adjustments. In general, the secret to a good sunball is to shot at low enough exposure to not over expose the sun and use curves to bring the rest of the image (which may end up underexposed as a consequence) back to the correct exposure.

 

The raw file from ISO 50 is the same as ISO 100 for the same exposure. Setting ISO 50 from 100 only changes the metering and the JPEG conversion.

[miguelcortes 0]

Hi David,

good shots.

I have the same equipment: 5D and ikelite housing. Which ikelite flat port are you using with the sigma 150 mm macro?, ¿could you show pics with that lense?

Thanks.

[Glasseye Snapper 70]

The raw file from ISO 50 is the same as ISO 100 for the same exposure. Setting ISO 50 from 100 only changes the metering and the JPEG conversion.

 

Hi Herb,

 

I'm trying to wrap my brains around your comment above. When not using manual mode, the camera will compensate for a change in ISO by adjusting its shutter and/or aperture settings so that the "image strength" of the RAW file will remain similar. However, I'm pretty sure that on my Canon 20D, changing the ISO setting will impact the RAW file when using identical exposure settings in manual mode. Is the ISO 50 setting on the 5D an exception and if so, what is the point?

 

Bart

 

(Edit) Sorry David, I briefly forgot about your shots. My favorite is the yellowhead jawfish, great detail, you can almost count the scales. The sponges are also a nice eye catcher but in both WA shots there is the impression of a spotlight lighting up just the central part of the image which makes it less natural. But I guess that is what you were referring to when you mentioned that lighting a full-frame image is quited different.

Edited December 22, 2006 by Glasseye Snapper

[herbko 0]

Hi Herb,

 

I'm trying to wrap my brains around your comment above. When not using manual mode, the camera will compensate for a change in ISO by adjusting its shutter and/or aperture settings so that the "image strength" of the RAW file will remain similar. However, I'm pretty sure that on my Canon 20D, changing the ISO setting will impact the RAW file when using identical exposure settings in manual mode. Is the ISO 50 setting on the 5D an exception and if so, what is the point?

 

Between ISO 100 and 1600 changing the ISO setting will change the gain in the analog amplifiers between the sensors and the analog-to-digital converter. It's good to set the gain ( choose the ISO ) high enough to use the full range of the analog-to-digital converter but not so high that the highlights get clipped. 100 to 1600 is the full range for the 5D. Both ISO 50 and 3200 just adds a tag to the raw file and changes the exposure. It's useful if you're shooting JPEG.

[MikeVeitch 0]

good stuff Dave

 

love the jawfish

[dmoss 0]

Hi David,

good shots.

I have the same equipment: 5D and ikelite housing. Which ikelite flat port are you using with the sigma 150 mm macro?, ¿could you show pics with that lense?

Thanks.

 

 

Hello Miguel,

Just now catching up on my Wetpixel reading.

Ikelite 5505.58 flat port is the one to use for the 150 Sigma. Make sure that the focus limiter switch isn't moved when you slide the port over the lens. This lens wants to 'hunt' quite a bit when focusing, but setting the limiter switch helps. Very sharp lens. You need to be extremely still and carefully select your focus point to make it work. I need some more practice with it !

 

Here are a couple taken with the lens.