Hi folks, this topic might be related to another thread in regard to R cameras freezing up.
I have quiet a large lens collection, only two of them are RF Lenses all others are EF lenses.
A big part of my collection are lenses 10 to 30 years old and I happily torture my new R7 with them to find out how they behave.
As some might know I use not only the Canon EF to R adapter but also a Viltrox Speed booster. The phenomenon I report happens on both but here I talk only about the Canon adapter.
With some lenses my camera locks up or after a few minutes of perfect behavior the AF start to stutter. Drove me mad so I started to investigate.
Factors I excluded first:
So I excluded Lenses which work so far flawless but which have wear and tear on the contacts because of being mounted 1000 of times in 30 years (Tokina ATX 28-70 2.8, Canon 20-200 2.8 L, Canon 400 2.8 L and Canon 85 1.2 L)
Again: all errors done after swiping the contacts
Now that sounds like a pretty simple explanation…. But it isn’t.
I clean my front and back elements and sensors whenever they are dirty. I also clean the lens contacts when I buy a used lens. But cleaning the contacts is usually not necessary. I have frequently used and changed lenses that I have never cleaned or not cleaned for maybe 15 years. Those lenses worked on the analog EOS 10, on the EOS 30d, on the EOS M and now on the R they show issues. So if a dirty contact seems to be the issue, previous EOS models could not be bothered to fail.
So my question is how many factors have changed in the evolution of the Canon bayonet?
Of course there are more contacts now, but the lenses in question don’t have them.
Is an R camera relying on contacts in existence since the first EOS but which never have been critical before? Do they read a contact which before just transferred juice? Did they change protocol, voltage or frequency?
I do not know enough to make a guess, but for my issues cleaning helps and that means from now on my after use lens care routine gets enriched by a swipe of the contacts.
Still I would like to know whats the driver behind. Maybe the more technical people here can make an educated guess or shed some light?
I have quiet a large lens collection, only two of them are RF Lenses all others are EF lenses.
A big part of my collection are lenses 10 to 30 years old and I happily torture my new R7 with them to find out how they behave.
As some might know I use not only the Canon EF to R adapter but also a Viltrox Speed booster. The phenomenon I report happens on both but here I talk only about the Canon adapter.
With some lenses my camera locks up or after a few minutes of perfect behavior the AF start to stutter. Drove me mad so I started to investigate.
Factors I excluded first:
- The Canon adapter (the Vilcrox also) is sound engineered, no wobbling, so the connection between the contacts should not be an issue.
- I skipped lenses with dodgy protocol implementation like Tamron 35-105 2.8 (1994) or several Sigma fisheyes (1992-1998)
- I skipped lenses with enormous energy consumption which already have proven to lock up my EOS 5dMK3 and EOS 1dxMK2 (Sigma Lenses again)
So I excluded Lenses which work so far flawless but which have wear and tear on the contacts because of being mounted 1000 of times in 30 years (Tokina ATX 28-70 2.8, Canon 20-200 2.8 L, Canon 400 2.8 L and Canon 85 1.2 L)
Again: all errors done after swiping the contacts
Now that sounds like a pretty simple explanation…. But it isn’t.
I clean my front and back elements and sensors whenever they are dirty. I also clean the lens contacts when I buy a used lens. But cleaning the contacts is usually not necessary. I have frequently used and changed lenses that I have never cleaned or not cleaned for maybe 15 years. Those lenses worked on the analog EOS 10, on the EOS 30d, on the EOS M and now on the R they show issues. So if a dirty contact seems to be the issue, previous EOS models could not be bothered to fail.
So my question is how many factors have changed in the evolution of the Canon bayonet?
Of course there are more contacts now, but the lenses in question don’t have them.
Is an R camera relying on contacts in existence since the first EOS but which never have been critical before? Do they read a contact which before just transferred juice? Did they change protocol, voltage or frequency?
I do not know enough to make a guess, but for my issues cleaning helps and that means from now on my after use lens care routine gets enriched by a swipe of the contacts.
Still I would like to know whats the driver behind. Maybe the more technical people here can make an educated guess or shed some light?