Double Focal Length

Brian Boyko · August 28th, 2009, 11:22 AM

I was thinking about buying a 300mm FD lens for my GH1 - this, as far as I can tell, is 600mm equivalent when placed on the FD? Meaning, that a Telephoto 100-300mm f/5.6-6.7 Manual Focus Lens would be functionally equivalent to a 200-600mm f/5.6-6.7? Was thinking about picking one up for sports photography.

Tom Hardwick · August 28th, 2009, 01:23 PM

Your maths is spot on if the 4/3rds GH1 has a 2x factor in its chip size relative to the standard 36 x 24 mm frame.

August 28th, 2009, 11:22 AM	#1
Brian Boyko Major Player Join Date: Dec 2006 Location: Austin, TX Posts: 773	Double Focal Length - does that mean... I was thinking about buying a 300mm FD lens for my GH1 - this, as far as I can tell, is 600mm equivalent when placed on the FD? Meaning, that a Telephoto 100-300mm f/5.6-6.7 Manual Focus Lens would be functionally equivalent to a 200-600mm f/5.6-6.7? Was thinking about picking one up for sports photography. __________________ Equip: Panny GH1, Canon HG20, Juicedlink, AT897, Sennh. EW/GW100, Zoom H2, Vegas 8.1

August 28th, 2009, 01:23 PM	#2
Tom Hardwick Inner Circle Join Date: Mar 2003 Location: Billericay, England UK Posts: 4,711	Your maths is spot on if the 4/3rds GH1 has a 2x factor in its chip size relative to the standard 36 x 24 mm frame.