FuV Canvassize by Fuchs & Vogel media solutions.
Changing width and height of your composition is no longer a problem in Cinema 4D. You can now resize your render output without altering the perspective, just like the canvas in Photoshop. Select an anchor point and type in the new height or width.
Features:
Tag-Based plugin
Restore your original camera at any time
Realtime feedback
Automated resolution adjustment in your active rendersetting
Looking for more from “Fuchs and Vogel”? Get in touch via the links below:
www.fuchsundvogel.com / www.vimeo.com/fuchsundvogel / www.facebook.com/fuchsundvogel
Available for download via 
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