Rick from NY Loc: Sarasota FL

Can’t help you with the TC question, but I can suggest that you ignore KR’s suggestions about pretty much anything related to photography. I have been a photographer for 50yrs and find much of what he suggests/recommends to be shallow, superficial, wildly subjective and too often useless. Especially his equipment recommendations which often take on a troll-like contrary position.

While i always consider myself to be my most “trusted” reviewer, I do understand the need and usefulness for folks to seek out advice From actual users on equipment choices, etc and I do that as well for previewing equipment I might be considering. But there are numerous pro reviewers online (among them Steve Perry on this site) who I respect and whose opinions I often agree with and who post equipment reviews and photo “how to’s” that are useful and not intentionally designed to simply be contrary or trolling. I urge you to read these folks rather than a guy who deals with clickbait.

photoman43

According to this chart, the 300 mm 4.5 takes the 14B as long as it is not type K.

I used to own many AI and AIS Nikon telephoto lenses and they all took the 14B.

tjkelly03

My experience with teleconverters focused on Canon but I think what I’m about to say is generic to all teleconverters.
I found with my 2x teleconverter is that the aperture doubles as well. So your f/4.5 means f/9 with the 2x teleconverter. That’s the widest you will be able to shoot at. It restricts low light exposures.

racerrich3 Loc: Los Angeles, Ca.

is this the same lens authorizeduser is referring to, 300 f4 ais manual focus ??

RWR Loc: La Mesa, CA

Read the OP.

racerrich3 Loc: Los Angeles, Ca.

no kidding. i was asking pixel if the lens he <-- was referring to was the same as the OP <--.
pixel gives a link for a 300 f/4 af-s. OP is asking about a 300 f/4.5 ais manual.