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

[Ramsden]

Hi

I haven't covered the view finder, and wasn't aware of that procedure. Could you please explain?

In this particular situation, i was quite literally wading through an old overgrown woodland, so it was easier to use the screen.

[jrhoffman75 · Accepted solution]

You can configure it to prevent having your settings changed by inadvertent dial movement. 

[normadel]

The correct hood for the EF 100mm f/2.8 Macro USM, which I have, is a Canon ET-67, or a clone (I have a JJC version). It is not a tulip hood. It's a straight tube 3" long. There's also another Canon 100mm lens, the EF 100mm f/2.8L Macro USM, which uses an ET-73 hood.

The way to see what hood Canon designed for a lens is to look in the Canon lens manual, which you can download. I have the manuals for all of my lenses. They contain a lot of good info.

[kvbarkley]

When you are using a remote release on a tripod and your eye is away from the viewfinder, stray light can enter the camera and influence the exposure. Canon provides a cover attached to the strap that you can use to cover the eyepiece so no light gets in. 
This is not an issue when using live view. 

[Ramsden]

Hi John

Thanks for that link. I have now updated the features that are locked. Another step on my learning curve with the EOS90D.

I had mistakenly thought that when my external lock switch was on, I was relatively safe.

Regards

Ramsden