EOS 90D Vertical shots underexposed

[Ramsden]

Hi folks

I had a strange occurence yesterday afternoon, here in the North of England.

EOS90D with a new 100mm Macro attached. I was shooting trains crossing a viaduct that was built around 1850 - so quite atmospheric.

Camera set on AI servo, High Speed continuos, AF large zone and partial metering. White balance set to Shade (7000k). Tripod set up so I could pan the 200 meter track. 

I appreciate that this wasnt the ideal lens for this composition. But, after getting a few shots of the viaduct to get line and focus set up; I had a reminder from a book I'd just read, to try and use vertical shots more often, and given the height of the viaduct this made sense. So 5 mins before the next train, switched camera to vertical, and took about 12 shots as the train crossed.

When I got home and downloaded the photos, all the vertical shots were black (under exposed?)

So what happened?

My only thought was that I didnt alter the 'tulip hood' for vertical and wondered if that would significantly alter the light?

Any explanations, advice, as always welcome.

Ramsden

[jrhoffman75]

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@Ramsden wrote:

Hi folks

I had a strange occurence yesterday afternoon, here in the North of England.

EOS90D with a new 100mm Macro attached. I was shooting trains crossing a viaduct that was built around 1850 - so quite atmospheric.

Camera set on AI servo, High Speed continuos, AF large zone and partial metering. White balance set to Shade (7000k). Tripod set up so I could pan the 200 meter track. 

I appreciate that this wasnt the ideal lens for this composition. But, after getting a few shots of the viaduct to get line and focus set up; I had a reminder from a book I'd just read, to try and use vertical shots more often, and given the height of the viaduct this made sense. So 5 mins before the next train, switched camera to vertical, and took about 12 shots as the train crossed.

When I got home and downloaded the photos, all the vertical shots were black (under exposed?)

So what happened?

My only thought was that I didnt alter the 'tulip hood' for vertical and wondered if that would significantly alter the light?

Any explanations, advice, as always welcome.

Ramsden

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If it is the correct lens hood is designed to not interfere with the rectangular format of the camera image. It doesn’t need to be changed no matter how you rotate the camera.

Did you perhaps inadvertently change exposure settings when changing camera position? What do the camera settings show when you view the images on LCD?

[Ramsden]

Hi John

Correct - I somehow changed the settings. Though, in my defense I was working in a woodland area with brambles and other things to distract me!

But, when I got this  100 mm Macro a couple of weeks ago, it didn't come with a hood. I had a tulip hood in my 'store' that fitted the lens. So where can I check that I have the correct hoods for this, and my other lenses?

Thanks

Ramsden

[pcs1]

Partial metering uses about 6%(dependending on model) of the frame to measure from. Probably this area used for metering ended up on a different(much lighter) part of the frame when changing orientation.

Lenshood has indeed nothing to do with this, would only affect part of your shot if fitted wrong and equally for portrait and landscape.

[p4pictures]

The EF 100mm f/2.8L Macro IS USM lens comes with a lens hood, the Canon ET-73 Lens Hood is supplied. It's not a tulip design hood, but just like a tube. 

If you have one of the other Canon EF 100mm macro lenses the hoods are...

• Canon EF 100mm f/2.8 Macro USM - ET-67 lens hood
• Canon EF 100mm f/2.8 Macro - ET-67 lens hood

[jrhoffman75]

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@Ramsden wrote:

Hi John

Correct - I somehow changed the settings. Though, in my defense I was working in a woodland area with brambles and other things to distract me!

But, when I got this  100 mm Macro a couple of weeks ago, it didn't come with a hood. I had a tulip hood in my 'store' that fitted the lens. So where can I check that I have the correct hoods for this, and my other lenses?

Thanks

Ramsden

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The proper hood for that lens is ET-73.

You can find the proper hood for any lens by checking the instruction manual for the lens on the Canon support site or searching Amazon for "lens hood for XXX"

Does your 90D have a "Lock" position for the OFF-ON switch?

[jrhoffman75]

I just checked - it does.

[jrhoffman75]

I checked. It does have a lock position.

[kvbarkley]

If you are using a tripod, are you covering the viewfinder?

what does the exit say?

[Ramsden]

I have a lock switch, bottom right hand rear of the camera body,  but its not by the 'on - off' switch.