IIR filter design libray

Rune Allnor wrote:
> Jerry Avins wrote:
> 
>>Rune, you inspired me to use my pocket digital camera (Fuji Finepix
>>A205) through a spotting scope. (I bought a scope for that and
> 
> another
> 
>>purpose through eBay, then added a 2" eyepiece holder, total cost
> 
> less
> 
>>than $100.) A home-brew fitting holds the camera by its lens barrel.
>>It's usable, but not yet complete.
>>
>>http://users.erols.com/jyavins/woodpecker1.jpg is a downy woodpecker
> 
> at
> 
>>my feeder taken from 30 feet away. I used a tripod (also home brew).
> 
> The
> 
>>camera holder attaches to a 28mm eyepiece (adapted to 1.25" from a
> 
> WWII
> 
>>artillery director) that also fits my 5" SCT, but I haven't tried
> 
> that
> 
>>combination yet.
> 
> 
> That's a nice bird. And the technical quality of the image is way
> beyond 
> anything I have achieved so far. 
> 
> Rune

There are pictures of the coupler is at http://tinyurl.com/5mex2
Someone asked what it was, and pictures were easier. I've since cut the 
collar shorter to allow the camera's lens more freedom to zoom. The 
eyepiece is WWII surplus Kelner, about 28 mm, with as wide an actual 
field as can be had in a standard 1.25" mount. The elbow telescope was 
an aiming device for artillery pieces. The eyepiece is at right angles 
to the direction of recoil for obvious reason. Nevertheless, long eye 
relief is needed to avoid a broken nose. That long eye relief is useful 
for coupling to a camera is incidental to the original design.

Jerry
-- 
Engineering is the art of making what you want from things you can get.
�����������������������������������������������������������������������

Rune Allnor wrote:
> It is getting half exiting these days, what wildlife is concerned.
> When I was a kid, the first sign of the spring coming was to see the
> sun for the first time after the dark season, which happened around
> January 30th -- February 1st where I used to live. Here in the south
> (about 65 degree N) we see the sun all year round, so these days the
> first sign of spring is the arrival of the oystercatchers. The
earliest
>
> date I have ever seen them, was March 13th two years ago. There is
> a rumor going that they one year were spotted as early as March 4th,
> so I tend to get by the beach every now and then to see if I can
catch
> a glimpse of them.

I went by an island a few kilometers from town today, and there
were at least 15 oystercatchers resting at the beach. I haven't
been at that particular spot for a couple of weeks, so they may
have been there for days already. The rumor has it that
oystercatchers have been spotted as far north as the Lofoten
Islands, 150 km north of the arctic circle. Come blizzard, come snow,
I don't care. It's offical. It's spring.

Rune

in article 1110630361.465332.196990@g14g2000cwa.googlegroups.com, Rune
Allnor at allnor@tele.ntnu.no wrote on 03/12/2005 07:26:

> I went by an island a few kilometers from town today, and there
> were at least 15 oystercatchers resting at the beach. I haven't
> been at that particular spot for a couple of weeks, so they may
> have been there for days already. The rumor has it that
> oystercatchers have been spotted as far north as the Lofoten
> Islands, 150 km north of the arctic circle. Come blizzard, come snow,
> I don't care. It's offical. It's spring.


my goodness, i'm 20 degrees south of you and it's still winter here.

-- 

r b-j                  rbj@audioimagination.com

"Imagination is more important than knowledge."

"robert bristow-johnson" <rbj@audioimagination.com> wrote in message 
news:BE5886F3.5330%rbj@audioimagination.com...
> in article 1110630361.465332.196990@g14g2000cwa.googlegroups.com, Rune
> Allnor at allnor@tele.ntnu.no wrote on 03/12/2005 07:26:
>
>> I went by an island a few kilometers from town today, and there
>> were at least 15 oystercatchers resting at the beach. I haven't
>> been at that particular spot for a couple of weeks, so they may
>> have been there for days already. The rumor has it that
>> oystercatchers have been spotted as far north as the Lofoten
>> Islands, 150 km north of the arctic circle. Come blizzard, come snow,
>> I don't care. It's offical. It's spring.
>
>
> my goodness, i'm 20 degrees south of you and it's still winter here.
>

Here in Atlanta, we were 78F yesterday. But this is the time of year we 
still have some cold days. Saturday I hiked up to the top of Brasstown Bald 
(The tallest peak in Georgia - N34 52 27.7  W83 48 40.3  elevation 4784Feet) 
where there was still some snow and ice. In town the Japanese Maples and 
Cherry trees are already blooming. The daffodils are still blooming - and 
they have been up for a couple of weeks already. Although a few days ago we 
were below freezing, this doesn't hurt these flowers. Also the geese have 
already started migrating back north although many live here year round. So 
Spring has sprung here.

Clay

] my goodness, i'm 20 degrees south of you and it's still winter here.

And I'm another few degrees south of you, and we had a nice snow storm
in Hartford on Saturday.

Brrrrr.

Ciao,

Peter K.

in article d3gZd.46178$%Y4.40848@bignews6.bellsouth.net, Clay S. Turner at
Physics@Bellsouth.net wrote on 03/14/2005 08:12:

> 
> "robert bristow-johnson" <rbj@audioimagination.com> wrote in message
> news:BE5886F3.5330%rbj@audioimagination.com...
>> in article 1110630361.465332.196990@g14g2000cwa.googlegroups.com, Rune
>> Allnor at allnor@tele.ntnu.no wrote on 03/12/2005 07:26:
>> 
>>> I went by an island a few kilometers from town today, and there
>>> were at least 15 oystercatchers resting at the beach. I haven't
>>> been at that particular spot for a couple of weeks, so they may
>>> have been there for days already. The rumor has it that
>>> oystercatchers have been spotted as far north as the Lofoten
>>> Islands, 150 km north of the arctic circle. Come blizzard, come snow,
>>> I don't care. It's offical. It's spring.
>> 
>> 
>> my goodness, i'm 20 degrees south of you and it's still winter here.
>> 
> 
> Here in Atlanta, we were 78F yesterday. But this is the time of year we
> still have some cold days. Saturday I hiked up to the top of Brasstown Bald
> (The tallest peak in Georgia - N34 52 27.7  W83 48 40.3  elevation 4784Feet)

is that the southern terminus of the AT?  i don't remember the name, but i
know the AT ends on top of mountains in Georgia and Maine.

> where there was still some snow and ice. In town the Japanese Maples and
> Cherry trees are already blooming. The daffodils are still blooming - and
> they have been up for a couple of weeks already. Although a few days ago we
> were below freezing, this doesn't hurt these flowers. Also the geese have
> already started migrating back north although many live here year round. So
> Spring has sprung here.

they're talking about it here.  SAP RUNS SOON!!!  mmmmmmmn!

but it sure looks like winter in Vermont.

-- 

r b-j                  rbj@audioimagination.com

"Imagination is more important than knowledge."

robert bristow-johnson wrote:
> in article 1110630361.465332.196990@g14g2000cwa.googlegroups.com,
Rune
> Allnor at allnor@tele.ntnu.no wrote on 03/12/2005 07:26:
>
> > I went by an island a few kilometers from town today, and there
> > were at least 15 oystercatchers resting at the beach. I haven't
> > been at that particular spot for a couple of weeks, so they may
> > have been there for days already. The rumor has it that
> > oystercatchers have been spotted as far north as the Lofoten
> > Islands, 150 km north of the arctic circle. Come blizzard, come
snow,
> > I don't care. It's offical. It's spring.
>
>
> my goodness, i'm 20 degrees south of you and it's still winter here.

I think that "Gulf stream" thing has something tho do with it
being habitable here...

Rune

"robert bristow-johnson" <rbj@audioimagination.com> wrote in message 
news:BE5B326E.53D1%rbj@audioimagination.com...


>> Clay wrote
>> Here in Atlanta, we were 78F yesterday. But this is the time of year we
>> still have some cold days. Saturday I hiked up to the top of Brasstown 
>> Bald
>> (The tallest peak in Georgia - N34 52 27.7  W83 48 40.3  elevation 
>> 4784Feet)
>
> is that the southern terminus of the AT?  i don't remember the name, but i
> know the AT ends on top of mountains in Georgia and Maine.

Oddly enough, Brasstown Bald is not on the AT; however a trail from the AT 
runs over to it.

The southern end starts at Springer Mountain. The following link is a good 
map of the trail in Georgia.

http://www.georgia-atclub.org/map.html

Georgia's part is about 80 miles long. I haven't hiked it yet - mountain 
bikes and dogs are not allowed on the AT. But I'm planning on doing the 
Blood Mountain part in a couple of weeks. I usually cycle the North Georgia 
mountains. There is a famous 100 mile ride that starts and ends in Dahlonega 
that crosses the Appalachians 6 times. Hence it is named the "Dahlonega Six 
Gap" ride.  I did that ride one year. I took me 8 and 1/2 hours to complete. 
It features over 10000 feet of climbing!

Here are links to three pics I took at the summit

http://personal.atl.bellsouth.net/p/h/physics/DSC_2452.gif

http://personal.atl.bellsouth.net/p/h/physics/DSC_2453.gif

http://personal.atl.bellsouth.net/p/h/physics/DSC_2454.gif


> > So  Spring has sprung here.
>
> they're talking about it here.  SAP RUNS SOON!!!  mmmmmmmn!
>
> but it sure looks like winter in Vermont.
>

Your Spring will come soon enough. And enjoy that maple syrup.  It is as 
expensive as gold down here.  While you are lamenting your brutal northern 
winters, just think about our 100 degree F days with 100% humidity during 
the summer. Plus there are all of the insects you could ever want.  Flying 
Cockroaches are fun. They hang out by the porch light and when you go 
through the doorway at night, they fly over to your back so you bring them 
into the house.


Clay

in article wlCZd.36050$5T6.15802@bignews4.bellsouth.net, Clay S. Turner at
Physics@Bellsouth.net wrote on 03/15/2005 09:33:

>>> So  Spring has sprung here.
>> 
>> they're talking about it here.  SAP RUNS SOON!!!  mmmmmmmn!
>> 
>> but it sure looks like winter in Vermont.
>> 
> 
> Your Spring will come soon enough. And enjoy that maple syrup.  It is as
> expensive as gold down here.  While you are lamenting your brutal northern
> winters, just think about our 100 degree F days with 100% humidity during
> the summer. Plus there are all of the insects you could ever want.  Flying
> Cockroaches are fun. They hang out by the porch light and when you go
> through the doorway at night, they fly over to your back so you bring them
> into the house.

well, Clay, i have to admit to being a little bit of a northern bigot.
partly because of some of the sociology of the south (which is
multidimensional - race, religion, education, politics, etc. - i'm a big
blue stater living in a "big" blue state), partly that i *do* like having
four seasons, partly that i *do* like only to have to run my A/C maybe twice
or three times a year (once in a while, even we get dog days in the summer).
anyway, because i live by woods by the lake (Champlain), we get some nasty
mosquitoes here, too.  in the spring, there is about a two week period when
it's warm enough to lie in the hammock out back before them nasty-ass
mosquitoes start happenin'.  then i have to bring the hammock in, because if
i don't just cover myself with DEET, they will carry me away.  fortunately,
no cockroaches.  lot'sa microscopic ants.

-- 

r b-j                  rbj@audioimagination.com

"Imagination is more important than knowledge."

robert bristow-johnson <rbj@audioimagination.com> writes:

> well, Clay, i have to admit to being a little bit of a northern bigot.
> partly because of some of the sociology of the south (which is
> multidimensional - race, religion, education, politics, etc. 

Are you saying you're a bigot of the south because it's a bunch of
bigots???
-- 
Randy Yates
Sony Ericsson Mobile Communications
Research Triangle Park, NC, USA
randy.yates@sonyericsson.com, 919-472-1124