Nikon DX lens Plus 1.4X Extender covers FF Sensor
Jan 31, 2018 17:53:34 #
Apaflo wrote:
In addition to TC's, the exact same optical configuration, known as a Barlow Lens, is used in most telephoto lenses, in most telescopes, and often in microscopy.
It has MANY uses.
It has MANY uses.
My reference is strictly to using them on DX lenses to cover FF - THAT's what I am referring to ! - and THAT only.
Jan 31, 2018 17:59:53 #
rcdovala wrote:
What is your basis for stating that there are few positive applications for it? This may be your opinion but it is not supported by facts.
OK, YOU tell us all - what these positive photgraphic applications are and the "facts" - please ! - and yes, it is my educated and experienced opinion - and I have no intention of "supporting" it !
Jan 31, 2018 18:10:17 #
lamiaceae wrote:
OMG (Said slowly)! I just found out two interesti... (show quote)
Pentax apparently has a table somewhere showing which "DA" lenses could be reclassified as "DFA", but I've never thought about it because I don't see a K-1 in my budget any time soon.
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Jan 31, 2018 18:11:59 #
imagemeister wrote:
My reference is strictly to using them on DX lenses to cover FF - THAT's what I am referring to ! - and THAT only.
That I do agree with!
Jan 31, 2018 19:23:01 #
rehess wrote:
Pentax apparently has a table somewhere showing which "DA" lenses could be reclassified as "DFA", but I've never thought about it because I don't see a K-1 in my budget any time soon.
Thank You , just reminded me there are better things to buy than an iphone 7+ (buying that would put me further away from a k-1).
Anyway I learnt something today a 1.4 Teleconverter can make a dx lens work on an fx sensor.
I Wonder if there is a 1.4 canon eos teleconverter that will accept a EF-S lens?
https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/320762-use-1-4x-rear-converter-improve-compatibility-da-lenses-k-1-full-frame.html
Seems this question was raised in 2016, it wasn't really resolved.
Jan 31, 2018 20:42:41 #
If you have no intention of supporting your claim, why would you think that you have the right to ask me to support mine?
imagemeister wrote:
OK, YOU tell us all - what these positive photgraphic applications are and the "facts" - please ! - and yes, it is my educated and experienced opinion - and I have no intention of "supporting" it !
Jan 31, 2018 20:48:02 #
rcdovala wrote:
If you have no intention of supporting your claim, why would you think that you have the right to ask me to support mine?
LOL ! ...YOU brought it up ...
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Jan 31, 2018 20:52:56 #
I think the issue might be that since an EF-S lens will not mount on an EF camera unless you modify the lens, it may be that an EF-S lens will also not mount on a Canon TC.
A couple of years ago, I purchased a Canon extension tube with the intention of using it on a crop sensor camera only to find out that I could mount the extension tube to the camera, but I could not mount my EF-S lenses to the extension tube. Now having said that, it very well may be that a Tamron or Tokina or some other third party TC will accept EF-S lenses. Just saying....
A couple of years ago, I purchased a Canon extension tube with the intention of using it on a crop sensor camera only to find out that I could mount the extension tube to the camera, but I could not mount my EF-S lenses to the extension tube. Now having said that, it very well may be that a Tamron or Tokina or some other third party TC will accept EF-S lenses. Just saying....
blackest wrote:
Thank You , just reminded me there are better thin... (show quote)
Jan 31, 2018 20:54:30 #
Jan 31, 2018 23:15:51 #
rehess wrote:
Pentax apparently has a table somewhere showing which "DA" lenses could be reclassified as "DFA", but I've never thought about it because I don't see a K-1 in my budget any time soon.
Same here but I do have two K-mount Pentax film cameras, K2 DMD, and a K1000.
Feb 1, 2018 08:42:31 #
rcdovala wrote:
I think the issue might be that since an EF-S lens... (show quote)
It is a fair bet the third party ones would work. For a Canon user with ef-s lenses just upgraded to full frame being able to use ef-s lenses even with the downsides of a teleconverter would be a bonus. Guess field of view would be around the same as on the crop sensor canon.
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Feb 1, 2018 10:10:24 #
lamiaceae wrote:
Yeah, I have a film Pentax Super Program, but it is enjoying semi-retirement, and this seems like a lot of work just to use {modern} DA lenses on occasionally.Same here but I do have two K-mount Pentax film cameras, K2 DMD, and a K1000.
Feb 1, 2018 11:33:49 #
rehess wrote:
Yeah, I have a film Pentax Super Program, but it is enjoying semi-retirement, and this seems like a lot of work just to use {modern} DA lenses on occasionally.
Other than mounting a 1.4X lens extender on the camera, what "work" is required to use DA lenses on a full frame camera?
Feb 1, 2018 11:58:47 #
rcdovala wrote:
Other than mounting a 1.4X lens extender on the camera, what "work" is required to use DA lenses on a full frame camera?
"DA" are Pentax K-mount lenses.
Any K-mount lens can mount on any Pentax camera.
You can mount a "DA" lens directly on FF camera.
If it is a film camera, it will vignette.
If it is the K-1, the camera will go into crop mode.
From the example which started this thread we are thinking that TC might alleviate these affects.
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