Canon PowerShot G11, G10

 

To add 72mm filters with no vignetting at any focal length requires:

 

Canon PowerShot G11, G10 FAQ

 

1. What's the difference between the Canon G11, G10 lens adapter LA-DC58K and the Lensmate G11, G10 58mm adapter?

• The Lensmate G11, G10 adapter is machined aluminum, made locally by small shop that specializes in aerospace and other high-tolerance parts. The Canon LA-DC58K is molded plastic. We make an adapter that fits snugly with no rocking play, and very little rotational movement when locked on. The Canon adapters fit in our experience and others is loose and rattly.


• The Canon adapter has a non-standard 57mm thread connecting the two halves. The Lensmate adapter has a 58mm thread there as well as on the outside which allows for more options like the use of wide-angle converter or a filter (in the wide to normal range).


• You can't put a filter on the outside of the LA-DC58K without the lens running into it at full telephoto. The Lensmate 58mm and 72mm lens adapters are just long enough to prevent the lens from contacting a filter. The difference is about .030". We can't see the difference when using the Canon TC-DC58D 1.4x between the two adapters, but if you want the Lensmate adapter to be exactly the same length as the LA- DC58K, just remove the gasket between the two halves. Just remember that you need to replace the gasket to use filters. Also remember that vignetting will occur between 28mm and 40mm with this setup.

2. What's the length of the Lensmate G11, G10 adapters?

The length of the base section is 1.263" Overall length of 58mm and 72mm adapters is 2.060"

3. Why not make a 77mm lens adapter?

When the potential for small amounts of vignetting was weighed against making a larger diameter part, we decided that 72mm was the sweet spot for several reasons. First, to make a larger part would require a costly custom aluminum extrusion with a large minimum order requirement. Extra cost to the consumer. Because of maximum size limitations of the CNC equipment being used.

4. Can a 72-77mm step ring be used on the Lensmate G11, G10 adapter?

Yes, if the filter is a low profile type.  The gasket between the two halves of the adapter ( Part A & Part B) should be removed to avoid vignetting.

5. What's the difference between Hoya Pro1 and Kenko Pro1 filters?

The parent company is THK (Tokina, Hoya, Kenko) of Japan. They are marketed in the US as Hoya and in rest of the world as Kenko and Hoya but are otherwise the same.

6. How is the optical viewfinder affected by the lens adapter?

The optical viewfinder is partially blocked by either lens adapter (58mm or 72mm) to varying degrees.  It is recommended to use the LCD when the adapter is attached.  The autofocus assist beam is also partially blocked by the lens adapter. 

7. Does the adapter affect the onboard flash? 

At the wide setting the flash is partially blocked, less so toward telephoto.  It is recommended to remove the adapter when using the onboard flash or use a hotshoe mounted flash. 

8. Can a lens hood be used with the lens adapter?

A wide angle lens hood may be used when part A is used alone*, or when the A + C combination is used*.  With the A + B 72mm filter configuration, a hood cannot be used, (though the adapter itself with no filter is effectively a hood over most of the zoom range).  When the Hakuba wide hood is used with a filter, the filter should be attached to the adapter first, then the hood to the filter.