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Main Board => Help => Topic started by: mikesnorth on August 14, 2010, 02:23:32 AM

Title: 1.7x converter wiht 28 and 35mm lenses
Post by: mikesnorth on August 14, 2010, 02:23:32 AM
Hey guys

Can anyone please explain why you can't use the HCD28 and HC35 lenses with the 1.7x converter?

Thanks!
Title: Re: 1.7x converter wiht 28 and 35mm lenses
Post by: AllynSar on August 15, 2010, 08:37:01 AM
I own both the 28mm HCD & the 1.7 converter. The reason those two will not work together is that the back element of the 28mm lens protrudes enough so that if attached to the 1.7 converter, it would hit the front element of the converter. The 28mm HCD has tabs that prevent connection to the converter thus sparing you from damaging both.

Allyn
Title: Re: 1.7x converter wiht 28 and 35mm lenses
Post by: Juan Pablo merchan on December 02, 2011, 04:01:33 PM
Allyn do you recomend buying the teleconverter to use with the 80mm lens?
Thankyou
Title: Re: 1.7x converter wiht 28 and 35mm lenses
Post by: H3dfan on December 02, 2011, 09:39:13 PM
The 80mm with 1,7 is about the fastest focussing comination next to the 150mm 3,2. It is sharp, fast and works perfectly balanced for longer shootings.
Title: Re: 1.7x converter wiht 28 and 35mm lenses
Post by: AllynSar on December 08, 2011, 10:29:52 AM
Juan,

   Yes! I use the converter with the 80 mm on backpacking trips. It also works well with the 13 and 26 mm extensions. Putting all four ( 80 + 1.7x + 13 + 26) together provides 1:1 magnification.

Allyn
Title: Re: 1.7x converter wiht 28 and 35mm lenses
Post by: Juan Pablo merchan on December 11, 2011, 06:00:38 AM
Allyn , with  this combination how many f stops you loss? Thank you
Title: Re: 1.7x converter wiht 28 and 35mm lenses
Post by: AllynSar on December 14, 2011, 10:49:35 AM
Juan,

   The 1.7x converter costs 1.5 stops. When the two extensions are added, 1 or 1.3 stops is lost. The range in lost stops for the extensions has to do with the focus used (infinity vs 0.7 meters).

   Hasselblad has an article about closeups with a set of tables on its Website under Downloads : Technical Information. This gives the stop loss for various combinations of lenses and extensions.

Allyn
Title: Re: 1.7x converter wiht 28 and 35mm lenses
Post by: Juan Pablo merchan on December 14, 2011, 01:23:40 PM
Thanks, great help