Originally posted by angelaasmith I have the Promaster Spectrum 7XR 28 -- 300. I was told it would work but would be loud. I had kept it because I couldn't get much for it. Is it much different than the Tamron 18-250
I cannot comment on the promaster beyond the users' reviews (
PROMASTER 28-300 f3.8-300mm Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database), but the DA18-250mm/Tamron18-250mm is regarded as one of the best all-around zoom across all brands incl. Canikon, Oly and others.
You may be interested to read my experience:
Favorite Lens: 18-250mm
Since you have already the Promaster, I would suggest that you use it first. If you feel that the lens does not suit you, or is not wide enough at 28mm, you could consider the DA18-250mm.
Hope that the comment may help.