Teleconverter with Nikkor 80-200 AF-D lens ?

On Sat, 05 Jun 2010 22:44:27 +0100, Bruce
wrote:

On Sat, 5 Jun 2010 11:15:03 -0700, Savageduck
wrote:
On 2010-06-05 09:32:56 -0700, RichA said:

Is Pentax the only company that has maintained 100% compatibility over
its lifespan?

Not even Pentax.
I have owned an M42 screw mount Spotmatic, and I still have my K1000.
There are compatibility issues with K mount lenses which came into play
with the introduction of AF. They also have issues similar to Nikon
with AF drive motors and metering. This has resulted in modification of
the K mount over the years, with no guarantee of backward compatibility.


That's overstating it. Using current Pentax DSLR bodies, there is at
least some backward compatibility with virtually every Pentax lens
ever made.

What? Compatible with the pre-WW2 Exacta mount?


All the screw mount lenses fit with a screw-to-K-bayonet adapter and
give stopped down aperture priority AE. All K mount lenses fit and
offer full aperture priority AE. All KA lenses fit and offer shutter
priority and program AE as well as aperture priority AE. All K AF
mount lenses fit and offer shutter priority, program and aperture
priority AE plus autofocus, but the power zoom feature of some early
AF lenses doesn't work.

I'm pretty sure the above is right but would welcome any corrections.
So that's virtually every Pentax lens ever made, and they all work on
the latest DSLRs, just with some limitation on exposure modes.

I think that is probably about the best backward compatibility of any
DSLR brand. People who bought Nikon F and Canon FL and FD lenses at
the same time Pentax users were buying Takumars, Super Takumars and
SMC Takumars must look on longingly at the Pentax screw lenses in use
on 21st century Pentax DSLRs.

Of course these people must be very old by now ... ;-)





Eric Stevens

"Eric Stevens" wrote in message
...


What? Compatible with the pre-WW2 Exacta mount?


My first SLR was an Exacta Vx II with a 50mm Schneider lens.

I wanted an SLR. My then criteria was because it was the camera used in the
movie Rear Window, it must be good.

--
Peter

On Sun, 6 Jun 2010 20:35:41 -0400, "Peter"
wrote:

"Eric Stevens" wrote in message
.. .


What? Compatible with the pre-WW2 Exacta mount?


My first SLR was an Exacta Vx II with a 50mm Schneider lens.

I wanted an SLR. My then criteria was because it was the camera used in the
movie Rear Window, it must be good.

It was good too.

Its lens mount was the original Pentax mount.



Eric Stevens

"Eric Stevens" wrote in message
...
On Sun, 6 Jun 2010 20:35:41 -0400, "Peter"
wrote:

"Eric Stevens" wrote in message
. ..


What? Compatible with the pre-WW2 Exacta mount?


My first SLR was an Exacta Vx II with a 50mm Schneider lens.

I wanted an SLR. My then criteria was because it was the camera used in
the
movie Rear Window, it must be good.

It was good too.

Its lens mount was the original Pentax mount.



I was not aware of that.

--
Peter

On Tue, 8 Jun 2010 07:52:31 -0400, "Peter"
wrote:

"Eric Stevens" wrote in message
.. .
On Sun, 6 Jun 2010 20:35:41 -0400, "Peter"
wrote:

"Eric Stevens" wrote in message
...


What? Compatible with the pre-WW2 Exacta mount?


My first SLR was an Exacta Vx II with a 50mm Schneider lens.

I wanted an SLR. My then criteria was because it was the camera used in
the
movie Rear Window, it must be good.

It was good too.

Its lens mount was the original Pentax mount.



I was not aware of that.

Probably because it was not true. I was mistaken.

I have been doing some research and discovered that some of the leter
post WW-2 Exactas used a 'K' mount of a type used by many camera
manufacturers, including the early Pentax. That's where I was getting
confused. It was a standard screw mount but it wasn't Exacta's. My
apologies for misleading you.



Eric Stevens

"Eric Stevens" wrote in message
...
On Tue, 8 Jun 2010 07:52:31 -0400, "Peter"
wrote:

"Eric Stevens" wrote in message
. ..
On Sun, 6 Jun 2010 20:35:41 -0400, "Peter"
wrote:

"Eric Stevens" wrote in message
m...


What? Compatible with the pre-WW2 Exacta mount?


My first SLR was an Exacta Vx II with a 50mm Schneider lens.

I wanted an SLR. My then criteria was because it was the camera used in
the
movie Rear Window, it must be good.

It was good too.

Its lens mount was the original Pentax mount.



I was not aware of that.

Probably because it was not true. I was mistaken.

I have been doing some research and discovered that some of the leter
post WW-2 Exactas used a 'K' mount of a type used by many camera
manufacturers, including the early Pentax. That's where I was getting
confused. It was a standard screw mount but it wasn't Exacta's. My
apologies for misleading you.



No apology needed. I really never knew whether or if, my Exacta was
compatible with other lenses.

I shot a roll at the bullfights that all had a black streak on them. I
brought the camera to Willoughby's and the lying *******s told me the
shutter needed to be replaced. I went elsewhere and traded in the camera for
a Nikkormat, with the worst lens Nikon ever made, but it was good for
snapshots of my kids. (43 -86) It was later that I found out that the black
streak was probably caused by my camera strap dangling in front of the lens.

--
Peter