unbranded extension tube

[alanswan]

not to mention it has the A setting.... *envy*

 

[creampuff]

A similar Pentax extension tube is on sale on eBay now
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170118999158

 

[istDeS]

Yes, that's the price I paid for all 3 pieces. I happened to chance upon it in a small photo finishing shop in Chinatown area earlier this year. It was in a box lumped together with other old and used stuff. Anyway the tubes were supposed to come in a nice Pentax leatherette pouch but that was missing. Didn't even come with caps. Imagine, I couldn't even bargain... :bsmilie:

Lucky you.:bsmilie: That is a good find and a good buy.

 

[alanswan]

A similar Pentax extension tube is on sale on eBay now
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170118999158

But no A setting leh....

 

[creampuff]

But no A setting leh....

Er... to my knowledge, Pentax did not make any extension tubes with the electronic contacts to allow AE exposure (A setting). I can still use Av mode with these tubes.

 

[alanswan]

oh okay.. I tot you mentioned your extension tubes had the A setting...
Read again and realised I read wrongly... My bad....

Moral of the story: Don't read forums during work.... What the heck....

 

[seafone]

hi macro lovers out there... when you guys use extension tube, does the SR still work? If that is so, what SR setting should be considered for example a 50mm lens. Should it be set to 100mm or still 50mm?

my camera last time got no SR... so this didn't strike or bother me.


cheerss..

 

[Snowywolf]

hi macro lovers out there... when you guys use extension tube, does the SR still work? If that is so, what SR setting should be considered for example a 50mm lens. Should it be set to 100mm or still 50mm?

my camera last time got no SR... so this didn't strike or bother me.


cheerss..

i used 100mm (for a 50mm lens + teleconverter (2x)).

but i have another question.. do we take into consideration the 1.5 ratio crop ratio?
hmm..

 

[istDeS]

hi macro lovers out there... when you guys use extension tube, does the SR still work? If that is so, what SR setting should be considered for example a 50mm lens. Should it be set to 100mm or still 50mm?

my camera last time got no SR... so this didn't strike or bother me.


cheerss..

Congrats, you have changed to K10D?

I thought 50mm on extension tube is still a 50mm. It's just that it will focus closer with extension tube. The setting should be 50mm.

 

[istDeS]

i used 100mm (for a 50mm lens + teleconverter (2x)).

but i have another question.. do we take into consideration the 1.5 ratio crop ratio?
hmm..

No, don't need to take the 1.5 crop ratio into consideration. Just use 100mm.

I don't know is it true, over-correct SR movement would cause the same or more blur than having it off.:dunno:

 

[seafone]

Congrats, you have changed to K10D?

I thought 50mm on extension tube is still a 50mm. It's just that it will focus closer with extension tube. The setting should be 50mm.

yah.. thankz, a GP. But I still like my *istD a lot.. k10d is just too big to bring everywhere..

SR gives me an impression that the compensation algorithm also take the length of the lens into consideration. With that in mind, the angle different based on the shake will be compensated differently. Maybe I am wrong.. I just can't conclude if 50mm should be the setting.

For a 2X TC, it is logical to set it to 2x as 100mm...

Maybe got to do more experiment to see which is the best SR setting on tube... anyway, i hope to get a real macro lens soon.

cheerss..