Yoshizen's Blog

Useless Information (?)


Image here was made by a Tri-color Pinhole which I could mount on

the A7 camera through Nikon to EOS and EOS to E-mount adapter. 

(What a hustle ! = I’ll tell you later.)

During all those hustle, what I found were — (though they may not

necessary useful to you.)    😀


1)  You can use Pentax-K lens cap on Nikon lens. (Photo Left) 

2)  Likewise, the same Pentax-K  lens cap will fit to the Sony

E-mount lens. (Photo Middle) 

3)  Sony E-mount body cap will fit to the Nikon body. (Photo Right)


4)  The adapter, EOS to E mount I got from Ebay (about £5 or so) had

a trouble — as bayonet spring was too wide and obstructing the lens

bottom goes into = I needed to file-down the width of those 3 springs

(where I marked in Red on the photo Right = see enlarged


(Photo shows the bayonet spring and a broken hence replaced screw)

= If you found the same trouble, you need to do the same — or buy

another, more expensive one. (So, they changed the price to £7.xx) 😀

(Think, why it was cheap = being defective, it became a deadstock and

sold as a scrap.   Then, Chinese guy made a Net business to sell away

= how many customers sending back and claim a money back which

would cost more, and the address may not even existed.)   😀

The funny story was, as I put negative feedback on ebay, the seller

contacted me saying if I change the feedback to positive,they will

refund me, so I replied them “As this blog explained, I’ve modified

its defect and now I’m using it, therefore no need of refund, still,

the fact remain I wouldn’t change the negative feedback” —

then, they send me yet another mail

“We will send you £2,  so change the feed back to positive” =

Are they thinking that they can buy me £2 ! = What a mentality !

Is this a norm in China ?   horrifying isn’t it ! 

To see the situation, I gave a through check of those adapters.


(To be fair, I obtained even one more EOS-NEX adapter)


In order to make a bayonet fixing tight enough= not clutter,

still smooth enough to dismount, the spring was used beneath

the craw (such as the one I’ve shown few picture before with

red mark), other cheaper alternative is to make a slit in the

claw (Photo above Left = yellow marked) and make the slit

bend to give some flexibility.    Though, the other EOS-NEX

adapter showed funny character = Canon’s EFS (plastic mount)

could be mounted but metal mount thousand pound lens couldn’t. 

Because the adapter’s female claw was too thick.  ==> I needed

to file down the claws thinner. (Photo Right — with blue color

marker =  it’s easy to see where I do need to cut !)

(It’s funny to discover, that the Canon is making their

cheap EFS lens mount even thinner and loose.)


5)  Nikon G to EOS adapter sold on the Net, the rotating lever may be

too long and stack with the lens bottom.  So that, if you found the sign

of such symptom, DON’T mount the lens to EOS with such adapter.  

You need to file-down the tip of the lever (marked in Red in the

photo above) a bit shorter, and make sure the lever moves freely.

Nikon Adopter_A09A6663-001


So, — after I’ve sorted out those troubles, I could mount my

Tri-color Pinhole (here, Pink, Yellow, Sky)  to the A7 body.

( Then after thought, I should make another one for A7, since an

Olympus body cap which is fit to A7 is  £0.99 and etc is free, but

the use of those adapter which is costing £5, £10 makes no sense.)


And, this was the photo of, now rather familiar view — by

the Zeiss Distagon 18mm, designed for Nikon mount.

—– A nightmare of the mount adapter IS = once the lens stack

to the body, there is no way else other than to destroy the lens.

(Pull-off the screws, fixed to the mount with sheer force or hack-saw 

the lens bottom while showering the camera with saw dust.)

Is it funny ?


PS :  If you are looking for the Body Cap for Sony NEX mount to use

for a Pinhole experiment etc. or just for body cover, now in the Ebay

you can find the pair of E-mount (NEX) Rear Lens Cap + Body Cap

for £0.99 —– you don’t need to hastle finding out OM cap.   🙂



2 Responses

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  1. OM Cap | Yoshizen's Blog said, on September 22, 2016 at 14:45

    […] can fit to the other cameras.   A very funny story behind […]

  2. […] homemade lenses were mounted on the OM body cap (which can be used as a Sony E-mount body cap), so that I can change each of the lens quite easily = take one out and […]

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