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01-25-2015, 06:18 PM - 7 Likes   #15106
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QuoteOriginally posted by marcusBMG Quote
TC's are pernickety! bear in mind that:
- they multiply all the aberrations/weaknesses of the lens
- they multiply all the technical difficulties of getting sharp pics with long focal length lenses: shake, vibration. small depth of field
- the latter being particularly made worse by slow shutter speeds from losing TWO stops worth of light ie your 300mm f4 + tc is 600mm f8
- tc's have a bit of a mix 'n match character its very possible that the pentacon 2x doesn't go too well with the takumar 300mm.it also sounds like thats an old tc, may not have good coatings, may not be very good period!
FWIW I'm really impressed by the combination of the DA*300 and HD DA 1.4 TC.



01-25-2015, 06:33 PM - 5 Likes   #15107
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QuoteOriginally posted by RobG Quote
FWIW I'm really impressed by the combination of the DA*300 and HD DA 1.4 TC.
Same here:

01-25-2015, 06:46 PM - 1 Like   #15108
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QuoteOriginally posted by r0ckstarr Quote
Same here:
Very nice indeed! You can even use the combination for astrophotography.

01-25-2015, 06:47 PM   #15109
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QuoteOriginally posted by RobG Quote
Very nice indeed! You can even use the combination for astrophotography.

I'm going to have to try that!

01-25-2015, 06:54 PM - 1 Like   #15110
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QuoteOriginally posted by r0ckstarr Quote
I'm going to have to try that!
Just be warned that even on an exposure as short as 10 seconds, the GPS was having trouble tracking at this magnification. That's why I needed to crank the K3 up to 3200 ISO. Stacking several shots at 10s would be better - if I could get the stacking to work...
01-25-2015, 07:15 PM - 3 Likes   #15111
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Attempted a few on the usual suspects-A 400/5.6 with Tamron 2x BBAR MC7 for the first time through glass storm door plus one w/o. Practice, practice, practice…………...
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01-25-2015, 08:15 PM - 2 Likes   #15112
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My DA*60-250 went down today, one of the contacts is missing... so I used my F 70-210.... a little too short to post here. But you can find some images in other threads. But I did shoot a bit with my A-400.





01-25-2015, 08:51 PM   #15113
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QuoteOriginally posted by normhead Quote
My DA*60-250 went down today, one of the contacts is missing... so I used my F 70-210.... a little too short to post here. But you can find some images in other threads. But I did shoot a bit with my A-400.
Sad to hear about your DA*60-250. But you always have good pictures with the A-400.


Last edited by swip; 01-26-2015 at 07:47 AM.
01-25-2015, 08:52 PM   #15114
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QuoteOriginally posted by normhead Quote
My DA*60-250 went down today, one of the contacts is missing...
Any idea how it happened? Is it DIY repairable?
01-26-2015, 01:51 AM   #15115
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ok thanks for that info was a good read. i did as you suggested and took some photos of a brick wall. was done between rain showers so i not as diligent as i would have liked overcast day i bumped up the iso to 200 still only 320 of a sec i think im not sure that it is the teleconverter i have included 2 pics for your perusal i think it may have been my tripod and a windy night maybe
the top photo is with the 2 times converter the bottom is just the 300 mm f4 wasn't as easy as i thought to get critical focus i think the top photo might be a hair off as i couldn't get the confirmation beep not sure why. even with live view i was struggling i had a towel on top of a steel 44 gallon drum i got the beep with the bottom one however. both pics taken from the same spot i think i'll investigate a different head and studier tripod on a sunny day before i rule anything out i think
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Last edited by chardie; 01-26-2015 at 02:14 AM.
01-26-2015, 07:41 AM   #15116
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QuoteOriginally posted by chardie Quote
wasn't as easy as i thought to get critical focus i think the top photo might be a hair off
Aye thats the game. Focus confirm only works for objects in centre of VF with MF lenses. I find its generally pretty spot on but may not necessarily coincide with my eye. if you're not sure, take a number of shots reocussing each time and pick the best, or deliberately "focus bracket". And use 2 secs mirror lock up of course (I was using my adaptall 200-500mm with some slow shtter speeds 1/50-1/200th at 500mm, resting on a bean bag and a remote shutter with no delay and was amazed at how the vibration transmitted down the lens was blurring some of the pics.... more about this eg here update and here).

QuoteOriginally posted by chardie Quote
i had a towel on top of a steel 44 gallon drum
Ziplock bag full of sand/fine gravel/rice better.

Pics look Ok, my impression is that the tc would pass the basic test of pulling in more detail than the lens alone, but the overall IQ (reflecting my experience with 2x tc's ) tending to disappoint. Just no substitute for getting closer and filling more of the frame with your subject (but often of course you can't...)

Last edited by marcusBMG; 01-26-2015 at 08:05 AM.
01-26-2015, 08:44 AM - 1 Like   #15117
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QuoteOriginally posted by r0ckstarr Quote
Any idea how it happened? Is it DIY repairable?
All that's missing is the little gold contact plate, it's on a tiny assembly held in place by two screws. It's probably like a 15$ part. Or might be a DiY repair if I had some copper or gold sheet of the right dimensions. If I could order the part it would be a snap.
01-26-2015, 09:04 AM - 4 Likes   #15118
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My first one for this thread. DA*300 + 1.7 TC

Bar-Headed geese. They fly over Himalayas to visit India


We fly over the Himalayas
by $udhakar, on Flickr

Last edited by Sudhakar; 01-26-2015 at 09:06 AM. Reason: Edited image URL issue
01-26-2015, 10:07 AM - 5 Likes   #15119
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Some interlopers in the yard today, checking out the bird action. (K-3, Tamron 1.4x & FA*300/2.8)



01-26-2015, 10:55 AM   #15120
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QuoteOriginally posted by dadipentak Quote
Some interlopers in the yard today
Hi Dave - It looks like that little fox is suffering from mange which is pretty tough on the animal - it would be nice if something could be done to help the animal out, from what I understand it is very uncomfortable and they continuously scratch themselves. Hey-whats that white stuff I see - we have spring going on here.
By the way I couldn't be happier with that 500
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