FA 28-105/4 - 5.6 Power Zoom ?

[Frank Knapik]

Three questions about the Pentax 28-105/4 - 5.6 Power Zoom:

1) Is this lens quick to focus in indoor lighting situations such as a wedding 
reception?

2) If I set the aperture at 5.6 or 8, will the aperture  remain constant through out 
the zoom's range (28-105)? 

3) The photodo.com review of the Pentax FA 28-105/4-5.6 zoom lens. Is it the Power 
Zoom?

Thank you

Francis

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