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I think I messed up with my adapter
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PostPosted: Sun Jul 04, 2021 5:46 pm    Post subject: I think I messed up with my adapter Reply with quote
Hi Everyone:

I have a lens with an M42 mount.

I bought a shift adapter from Fotodiox, found here:
https://fotodioxpro.com/products/ef-sne-sht
Description: Fotodiox Pro Lens Mount Shift Adapter - Canon EOS (EF / EF-S) D/SLR Lens to Sony Alpha E-Mount Mirrorless Camera Body

I then bought an EOS to M42 Mount adapter, found here:
https://www.amazon.in/gp/product/B092TVPGJ5/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Description: Elegant Essence Manual Adapter Ring for Canon EOS EF Mount to Camera M42 Screw Mount Lens Converter Infinity Focus Smooth Surface

So neither did the M42 side fit my lens nor did the EOS side fit my shift adapter. I guess the M42 adapter was made for a camera not for another adapter.

Anyways, I just want to verify that if I purchased the following adapters, would my problem be solved?

https://www.amazon.in/dp/B001G4QXN2/?coliid=I3HSYLBPQD761G&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it
or
https://www.amazon.in/dp/B002VSLKVC/?coliid=I2RDHGVOGTOYN4&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it

Thanks for your help!!

-Charles


PostPosted: Sun Jul 04, 2021 6:34 pm    Post subject: Reply with quote
Yes


PostPosted: Sun Jul 04, 2021 8:04 pm    Post subject: Re: I think I messed up with my adapter Reply with quote
charley5 wrote:
Hi Everyone:

I have a lens with an M42 mount.

I bought a shift adapter from Fotodiox, found here:
https://fotodioxpro.com/products/ef-sne-sht
Description: Fotodiox Pro Lens Mount Shift Adapter - Canon EOS (EF / EF-S) D/SLR Lens to Sony Alpha E-Mount Mirrorless Camera Body

I then bought an EOS to M42 Mount adapter, found here:
https://www.amazon.in/gp/product/B092TVPGJ5/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Description: Elegant Essence Manual Adapter Ring for Canon EOS EF Mount to Camera M42 Screw Mount Lens Converter Infinity Focus Smooth Surface

So neither did the M42 side fit my lens nor did the EOS side fit my shift adapter. I guess the M42 adapter was made for a camera not for another adapter.

Anyways, I just want to verify that if I purchased the following adapters, would my problem be solved?

https://www.amazon.in/dp/B001G4QXN2/?coliid=I3HSYLBPQD761G&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it
or
https://www.amazon.in/dp/B002VSLKVC/?coliid=I2RDHGVOGTOYN4&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it

Thanks for your help!!

-Charles


Mounting an adapter on another adapter instead of a camera won't usually make any difference. Adapters are made to go on cameras but in most cases will also fit adapters without any issues. I often stack adapters like this to make use of special features (like shift) with a wider range of lenses.
Other than multiplying registration errors I've only run into issues with LM mount adapters mounting on the TechArt Pro - where the body of the adapter can foul on the techart - I learned in this case only to buy adapters that specify they work with the techart.

Having a belated look at your links I see you got an adapter for mounting EF lenses on M42 bodies (the wrong way round for you) - something new I've been looking for similar adapters to mount bayonet lenses on M42 helicoids for years. They're still difficult to track down on e-bay, but I've at least got an EF one ordered (without infinity focus optics for my applications).

Last edited by DConvert on Sun Jul 04, 2021 9:21 pm; edited 2 times in total


PostPosted: Sun Jul 04, 2021 8:04 pm    Post subject: Re: I think I messed up with my adapter Reply with quote
Charles,

I agree with visualopsins' answer, but I'm a bit more long winded. So...


charley5 wrote:
. . .
I then bought an EOS to M42 Mount adapter, found here:
https://www.amazon.in/gp/product/B092TVPGJ5/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Description: Elegant Essence Manual Adapter Ring for Canon EOS EF Mount to Camera M42 Screw Mount Lens Converter Infinity Focus Smooth Surface

Interesting. I never knew there was such an adapter. I guess there's a use case for every imaginable combination.


charley5 wrote:
. . .
Anyways, I just want to verify that if I purchased the following adapters, would my problem be solved?

https://www.amazon.in/dp/B001G4QXN2/?coliid=I3HSYLBPQD761G&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it
or
https://www.amazon.in/dp/B002VSLKVC/?coliid=I2RDHGVOGTOYN4&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it

Yes.

And it may be I worry too much, but I would choose a black adapter to minimize the possibility of unwanted reflections.

Also, I see the Fotodiox adapter listing shows the adapter mounted on a Pentax Super-Multi-Coated Takumar which has open aperture metering hardware on its mount. In most cases I'm happy to use a M42 to EF adapter with a flange / lip to depress the stop down pin. But in the case of M42 lenses which have open aperture metering hardware, my own flanged adapter rubs against the mentioned hardware making it difficult to move the aperture ring.

My solution was to simply buy another M42 to EF adapter which didn't have the stop down flange / lip.

Perhaps the Fotodiox flanged adapter has no such issue? I don't know. My adapter is a no name from China which I found on ebay.

Here are my two adapters and a Pentax S-M-C lens with the conflicting hardware highlighted:



#1


PostPosted: Mon Jul 05, 2021 4:50 am    Post subject: Reply with quote
visualopsins wrote:
Yes


Thanks!


PostPosted: Mon Jul 05, 2021 4:52 am    Post subject: Re: I think I messed up with my adapter Reply with quote
DConvert wrote:
charley5 wrote:
Hi Everyone:

I have a lens with an M42 mount.

I bought a shift adapter from Fotodiox, found here:
https://fotodioxpro.com/products/ef-sne-sht
Description: Fotodiox Pro Lens Mount Shift Adapter - Canon EOS (EF / EF-S) D/SLR Lens to Sony Alpha E-Mount Mirrorless Camera Body

I then bought an EOS to M42 Mount adapter, found here:
https://www.amazon.in/gp/product/B092TVPGJ5/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Description: Elegant Essence Manual Adapter Ring for Canon EOS EF Mount to Camera M42 Screw Mount Lens Converter Infinity Focus Smooth Surface

So neither did the M42 side fit my lens nor did the EOS side fit my shift adapter. I guess the M42 adapter was made for a camera not for another adapter.

Anyways, I just want to verify that if I purchased the following adapters, would my problem be solved?

https://www.amazon.in/dp/B001G4QXN2/?coliid=I3HSYLBPQD761G&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it
or
https://www.amazon.in/dp/B002VSLKVC/?coliid=I2RDHGVOGTOYN4&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it

Thanks for your help!!

-Charles


Mounting an adapter on another adapter instead of a camera won't usually make any difference. Adapters are made to go on cameras but in most cases will also fit adapters without any issues. I often stack adapters like this to make use of special features (like shift) with a wider range of lenses.
Other than multiplying registration errors I've only run into issues with LM mount adapters mounting on the TechArt Pro - where the body of the adapter can foul on the techart - I learned in this case only to buy adapters that specify they work with the techart.

Having a belated look at your links I see you got an adapter for mounting EF lenses on M42 bodies (the wrong way round for you) - something new I've been looking for similar adapters to mount bayonet lenses on M42 helicoids for years. They're still difficult to track down on e-bay, but I've at least got an EF one ordered (without infinity focus optics for my applications).


Thank you for the info!


PostPosted: Mon Jul 05, 2021 4:54 am    Post subject: Re: I think I messed up with my adapter Reply with quote
55 wrote:
Charles,

I agree with visualopsins' answer, but I'm a bit more long winded. So...


charley5 wrote:
. . .
I then bought an EOS to M42 Mount adapter, found here:
https://www.amazon.in/gp/product/B092TVPGJ5/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Description: Elegant Essence Manual Adapter Ring for Canon EOS EF Mount to Camera M42 Screw Mount Lens Converter Infinity Focus Smooth Surface

Interesting. I never knew there was such an adapter. I guess there's a use case for every imaginable combination.


charley5 wrote:
. . .
Anyways, I just want to verify that if I purchased the following adapters, would my problem be solved?

https://www.amazon.in/dp/B001G4QXN2/?coliid=I3HSYLBPQD761G&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it
or
https://www.amazon.in/dp/B002VSLKVC/?coliid=I2RDHGVOGTOYN4&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it

Yes.

And it may be I worry too much, but I would choose a black adapter to minimize the possibility of unwanted reflections.

Also, I see the Fotodiox adapter listing shows the adapter mounted on a Pentax Super-Multi-Coated Takumar which has open aperture metering hardware on its mount. In most cases I'm happy to use a M42 to EF adapter with a flange / lip to depress the stop down pin. But in the case of M42 lenses which have open aperture metering hardware, my own flanged adapter rubs against the mentioned hardware making it difficult to move the aperture ring.

My solution was to simply buy another M42 to EF adapter which didn't have the stop down flange / lip.

Perhaps the Fotodiox flanged adapter has no such issue? I don't know. My adapter is a no name from China which I found on ebay.

Here are my two adapters and a Pentax S-M-C lens with the conflicting hardware highlighted:



#1



This is very informative. Thank you!


PostPosted: Mon Jul 05, 2021 6:10 am    Post subject: Re: I think I messed up with my adapter Reply with quote
charley5 wrote:
I then bought an EOS to M42 Mount adapter, found here:
https://www.amazon.in/gp/product/B092TVPGJ5/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Description: Elegant Essence Manual Adapter Ring for Canon EOS EF Mount to Camera M42 Screw Mount Lens Converter Infinity Focus Smooth Surface


I didn't know it is possible to use EF-lenses with m42 camera and actually don't understand why? Smile

But yes, a 24-70/2.8L would look cool with Praktica.


PostPosted: Mon Jul 05, 2021 7:19 am    Post subject: Re: I think I messed up with my adapter Reply with quote
DConvert wrote:
charley5 wrote:
Hi Everyone:

I have a lens with an M42 mount.

I bought a shift adapter from Fotodiox, found here:
https://fotodioxpro.com/products/ef-sne-sht
Description: Fotodiox Pro Lens Mount Shift Adapter - Canon EOS (EF / EF-S) D/SLR Lens to Sony Alpha E-Mount Mirrorless Camera Body

I then bought an EOS to M42 Mount adapter, found here:
https://www.amazon.in/gp/product/B092TVPGJ5/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Description: Elegant Essence Manual Adapter Ring for Canon EOS EF Mount to Camera M42 Screw Mount Lens Converter Infinity Focus Smooth Surface

So neither did the M42 side fit my lens nor did the EOS side fit my shift adapter. I guess the M42 adapter was made for a camera not for another adapter.

Anyways, I just want to verify that if I purchased the following adapters, would my problem be solved?

https://www.amazon.in/dp/B001G4QXN2/?coliid=I3HSYLBPQD761G&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it
or
https://www.amazon.in/dp/B002VSLKVC/?coliid=I2RDHGVOGTOYN4&colid=16HPM04H2PYBP&psc=0&ref_=lv_ov_lig_dp_it

Thanks for your help!!

-Charles


Mounting an adapter on another adapter instead of a camera won't usually make any difference. Adapters are made to go on cameras but in most cases will also fit adapters without any issues. I often stack adapters like this to make use of special features (like shift) with a wider range of lenses.
Other than multiplying registration errors I've only run into issues with LM mount adapters mounting on the TechArt Pro - where the body of the adapter can foul on the techart - I learned in this case only to buy adapters that specify they work with the techart.

Having a belated look at your links I see you got an adapter for mounting EF lenses on M42 bodies (the wrong way round for you) - something new I've been looking for similar adapters to mount bayonet lenses on M42 helicoids for years. They're still difficult to track down on e-bay, but I've at least got an EF one ordered (without infinity focus optics for my applications).


Just a quick question. Are there male and female versions of adapters? Is that what happened here?

Thanks!


PostPosted: Mon Jul 05, 2021 7:35 am    Post subject: Re: I think I messed up with my adapter Reply with quote
kansalliskala wrote:
charley5 wrote:
I then bought an EOS to M42 Mount adapter, found here:
https://www.amazon.in/gp/product/B092TVPGJ5/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Description: Elegant Essence Manual Adapter Ring for Canon EOS EF Mount to Camera M42 Screw Mount Lens Converter Infinity Focus Smooth Surface


I didn't know it is possible to use EF-lenses with m42 camera and actually don't understand why? Smile

But yes, a 24-70/2.8L would look cool with Praktica.


Yes, "infinity focus" and "manual control of aperture" as advertised both are impossible! (flange distance of EOS EF of 44mm being less than M42 45.46mm, and EOS EF lens larger diameter no way to mount inside M42 opening to allow infinity focus. Only possible if adapter has lens element -- this one does not!)


PostPosted: Mon Jul 05, 2021 8:03 am    Post subject: Re: I think I messed up with my adapter Reply with quote
[quote="charley5"]
DConvert wrote:
[
Just a quick question. Are there male and female versions of adapters? Is that what happened here?

Thanks!


m42 lens to EOS-camera is probably the most common adapter around.

This EF to m42-camera is first one I ever seen.


PostPosted: Mon Jul 05, 2021 8:07 am    Post subject: Re: I think I messed up with my adapter Reply with quote
visualopsins wrote:

Yes, "infinity focus" and "manual control of aperture" as advertised both are impossible! (flange distance of EOS EF of 44mm being less than M42 45.46mm, and EOS EF lens larger diameter no way to mount inside M42 opening to allow infinity focus. Only possible if adapter has lens element -- this one does not!)


I thought there was a lens?


PostPosted: Mon Jul 05, 2021 9:35 pm    Post subject: Re: I think I messed up with my adapter Reply with quote
charley5 wrote:


Just a quick question. Are there male and female versions of adapters? Is that what happened here?

Thanks!


In a way yes, usually adapters will mount lenses from a longer registration system onto bodies of shorter registration.
Each mount will have both male & female versions - usually male on the lens & female on the body but I think there are a few obscure exceptions to that.
In some cases the reverse of the standard adapter is available with optical elements to allow infinity focus or for macro/close focus use only.
There are some further complications with screw mounts as some of them are readily available as helicoids (M42 is the most common variant here) Specialshort M42 adapters are made for mounting helicoids - I have an e-mount one which is over 25mm too short for mounting M42 lenses. - It seems manufacturers are at last starting to produce adapters for the other end of the helicoid. In time no doubt the listings will make this clearer.
I must admit I think EF is a strange choice for putting on a helicoid as the lens needs electronic signals to adjust aperture & focus. But I suppose it is a very popular mount.
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