Telephoto focus

mysti · Oct 19, 2003

Hi

I have 2x telephoto lens for my CP5700, but unfortunatelly my camera can't focus with this lens. And when it focus (in high distance) it dont seems to be 2x lens (maybe 1.5 or 1.3) .
Can You hel;p me ??
Setting telelens/normal doesnt help at all

Ching-Kuang Shene · Oct 19, 2003

mysti said:
I have 2x telephoto lens for my CP5700, but unfortunatelly my
camera can't focus with this lens. And when it focus (in high
distance) it dont seems to be 2x lens (maybe 1.5 or 1.3) .
Can You hel;p me ??

Since Nikon does not have a 2X converter, I would assume your 2X is not a Nikon. Many third party teleconverter lenses, especially those cheap to very cheap ones, are not 2X at all. If, as you said, it is not 2X when the camera is focused at infinity, that converters may have a specification problem. In fact, I also happen to have a few third party 2X converter lenses that are not 2X. In some cases, these are video lenses that have lower or even much lower resolution. Since their design spec may not be strict enough to support some higher end digital cameras, it is very likely you may fail to focus. If I were you, I would buy some converters that are known to be good and compatible with the 5700. If you do not like the TC-E15ED and need a little more reach, Olympus TCON-17 is a very good choice for about $100. This TCON-17 is as good as the TC-E15ED and is a 1.7X rather than 1.5X.

mysti said:
Setting telelens/normal doesnt help at all

No, it won't help because it is a problem of the converter lens.

CK
http://www.cs.mtu.edu/~shene/DigiCam
Nikon Coolpix 950/990/995/2500/4500 User Guide

mysti · Oct 19, 2003

Ching-Kuang Shene said:
mysti said:

I have 2x telephoto lens for my CP5700, but unfortunatelly my
camera can't focus with this lens. And when it focus (in high
distance) it dont seems to be 2x lens (maybe 1.5 or 1.3) .
Can You hel;p me ??

Click to expand...

Since Nikon does not have a 2X converter, I would assume your 2X is
not a Nikon. Many third party teleconverter lenses, especially
those cheap to very cheap ones, are not 2X at all. If, as you
said, it is not 2X when the camera is focused at infinity, that
converters may have a specification problem. In fact, I also
happen to have a few third party 2X converter lenses that are not
2X. In some cases, these are video lenses that have lower or even
much lower resolution. Since their design spec may not be strict
enough to support some higher end digital cameras, it is very
likely you may fail to focus. If I were you, I would buy some
converters that are known to be good and compatible with the 5700.
If you do not like the TC-E15ED and need a little more reach,
Olympus TCON-17 is a very good choice for about $100. This TCON-17
is as good as the TC-E15ED and is a 1.7X rather than 1.5X.

Member said:

Setting telelens/normal doesnt help at all

Click to expand...

No, it won't help because it is a problem of the converter lens.

CK
http://www.cs.mtu.edu/~shene/DigiCam
Nikon Coolpix 950/990/995/2500/4500 User Guide

My lens is produced by "TITANIUM" and I paid for it about 150$. It's designed for high resolution photography. Do You have any other idea?

Kaj E · Oct 19, 2003

Interesting. How do you attach the TCON-17 to a CP 5700? Any vignetting?

Ching-Kuang Shene said:
mysti said:

I have 2x telephoto lens for my CP5700, but unfortunatelly my
camera can't focus with this lens. And when it focus (in high
distance) it dont seems to be 2x lens (maybe 1.5 or 1.3) .
Can You hel;p me ??

Click to expand...

Since Nikon does not have a 2X converter, I would assume your 2X is
not a Nikon. Many third party teleconverter lenses, especially
those cheap to very cheap ones, are not 2X at all. If, as you
said, it is not 2X when the camera is focused at infinity, that
converters may have a specification problem. In fact, I also
happen to have a few third party 2X converter lenses that are not
2X. In some cases, these are video lenses that have lower or even
much lower resolution. Since their design spec may not be strict
enough to support some higher end digital cameras, it is very
likely you may fail to focus. If I were you, I would buy some
converters that are known to be good and compatible with the 5700.
If you do not like the TC-E15ED and need a little more reach,
Olympus TCON-17 is a very good choice for about $100. This TCON-17
is as good as the TC-E15ED and is a 1.7X rather than 1.5X.

Member said:

Setting telelens/normal doesnt help at all

Click to expand...

No, it won't help because it is a problem of the converter lens.

CK
http://www.cs.mtu.edu/~shene/DigiCam
Nikon Coolpix 950/990/995/2500/4500 User Guide

--
Kaj E

mysti · Oct 19, 2003

Kaj E said:
Interesting. How do you attach the TCON-17 to a CP 5700? Any
vignetting?

I have two Nikon adapters (just rings) that i received with my wide lens. I put the wide lens on the longer one, and i put my tele lens on both of them (the shorter is signed tele lens adapter). Thats all.
What can I do?

Ching-Kuang Shene · Oct 19, 2003

mysti said:
My lens is produced by "TITANIUM" and I paid for it about 150$.
It's designed for high resolution photography. Do You have any
other idea?

I have two Titanium series 2X telephoto lenses for testing with my 4500. None of them delivers 2X performance. I personally suspect that there has to be some incompatibility here. Or, the spec is not entirely accurate. If I were you, I would return it and buy a TCON-17!

CK

Ching-Kuang Shene · Oct 19, 2003

Kaj E said:
Interesting. How do you attach the TCON-17 to a CP 5700? Any
vignetting?

I use Nextphoto's adapter which has an inner 50mm thread for Nikon's TC-E15ED and WC-E80 and an outer 62mm thread for other accessories such as lenses and filters. Since the TCON-17 has a 55mm rear thread, a 62-55mm step-down ring is required. There is no vignetting.

CK
http://www.cs.mtu.edu/~shene/DigiCam
Nikon Coolpix 950/990/995/2500/4500 User Guide

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