Search found 3430 matches
- Thu Nov 19, 2015 8:10 am
- Forum: Equipment Discussions
- Topic: Rubber smell driving me crazy
- Replies: 12
- Views: 2066
I've had similar problems with other products containing rubber that were made in China. American rubber products don't seem to have the problem, and European even less. Not sure where your tubes were made but if they are Chinese (like 90+% are) you may want to buy some non-Chinese sourced tubes. I ...
- Sun Nov 01, 2015 8:58 pm
- Forum: Equipment Discussions
- Topic: APO-Rodagon D series 50mm info
- Replies: 9
- Views: 2541
- Tue Oct 06, 2015 8:36 am
- Forum: Equipment Discussions
- Topic: Cheap 10x finite objective w WD>=2cm
- Replies: 18
- Views: 3212
I have verified that the short cone-shaped adapters like this one: http://www.ebay.com/itm/321850620563?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT work well with the MM objectives. They add 53mm of extension. My measured total required extension for 10x is 145mm, sensor to mounting t...
- Sun Sep 06, 2015 8:04 am
- Forum: Equipment Discussions
- Topic: Nikon low mag Plan objectives with irises
- Replies: 9
- Views: 1544
- Sun Sep 06, 2015 6:53 am
- Forum: Equipment Discussions
- Topic: Nikon low mag Plan objectives with irises
- Replies: 9
- Views: 1544
I've had mixed results with the various Chinese objectives I've tried, mostly 2x and 4x from different brands. One or two were excellent, but some not so great. Biggest issue was coverage, with some field problems correctable with stacking, some not. Most all were good in the center so you can't go ...
- Sat Sep 05, 2015 12:46 pm
- Forum: Equipment Discussions
- Topic: Nikon low mag Plan objectives with irises
- Replies: 9
- Views: 1544
Here's a thread from about a year ago with useful info on these objectives:
http://www.photomacrography.net/forum/v ... 0010c15148
http://www.photomacrography.net/forum/v ... 0010c15148
- Fri Sep 04, 2015 2:00 pm
- Forum: Equipment Discussions
- Topic: Nikon low mag Plan objectives with irises
- Replies: 9
- Views: 1544
- Fri Sep 04, 2015 8:34 am
- Forum: Equipment Discussions
- Topic: Nikon low mag Plan objectives with irises
- Replies: 9
- Views: 1544
These were useful in the film days when we needed to compromise between sharpness and DOF such that a single shot could be taken of a macro subject. My experience with them (I have tested the 2x IIRC) is they are not great wide open (poor coverage, aberrations not well-corrected), and really need to...
- Mon Aug 31, 2015 8:09 am
- Forum: Equipment Discussions
- Topic: Focus Stacking : moving subject vs moving camera
- Replies: 16
- Views: 4916
Keep in mind it's not just the camera and the specimen you must deal with. In addition there are specimen holders that need to be moved, as well as lighting arrangements. Though it may seem cumbersome, the camera plus lens may be the least problematic part of the setup to move. Horizontal vs vertica...
- Sun Aug 09, 2015 4:12 am
- Forum: Equipment Discussions
- Topic: Looking for cheap 1x objective with WD less than 45 mm
- Replies: 12
- Views: 2397
The optics of the cheaper 1x objectives I've seen are usually quite simple, often just a single lens group. The actual WD to the lens surface is actually longer, the extra PD being filled-in with empty lens case space, which may be removable to increase WD. So if an objective has "too short" WD, it ...
- Sat Jun 13, 2015 7:27 pm
- Forum: Equipment Discussions
- Topic: Nomenclature Question: EPOI
- Replies: 5
- Views: 1091
- Sat Jun 13, 2015 9:15 am
- Forum: Equipment Discussions
- Topic: Nomenclature Question: EPOI
- Replies: 5
- Views: 1091
Nomenclature Question: EPOI
Sorry for the silly question, but what does the acronym EPOI stand for? I assume it is an acronym. It is on stickers for many optical items I have around. Export sticker?
- Mon Jun 01, 2015 8:45 am
- Forum: Equipment Discussions
- Topic: APO-COMPONON 4.0/45 Fixed f4 Direct from Schneider for $250
- Replies: 20
- Views: 4704
- Mon Jun 01, 2015 8:05 am
- Forum: Equipment Discussions
- Topic: APO-COMPONON 4.0/45 Fixed f4 Direct from Schneider for $250
- Replies: 20
- Views: 4704
- Mon Jun 01, 2015 7:36 am
- Forum: Equipment Discussions
- Topic: Need advice on macro lens choice
- Replies: 40
- Views: 9717
What is interesting is the 10x-A designation and the recessed front element (or possible missing front element). My 10X MM front element is only recessed about 2mm. BTW the poor shape and high price kept me away. Looks more like it is "missing". It's doubtful there was such a big design change betw...